237 results found.
... Science Frontiers ONLINE No. 92: Mar-Apr 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Chaos At The Amusement Park Readers of Science Frontiers are well aware that some denizens of our solar system exhibit chaotic motion, as do some pendulums and even dripping faucets. Chaosists seem to be able to find chaos everywhere they look. If you have ever ridden on that amusement park staple called the Tilt-A -Whirl, you will recall that the ride is fun because you never know exactly what the car you are riding in will do as the platforms move along the hilly circular track. Each car is free to rotate about its center and will also tilt in all possible directions as the cars go up and down the hills. Can one mathematically predict whether the car will spin clockwise, counterclockwise, or not at all? What a neat problem for a physicist! And two physicists, R.L . Kautz and B.M . Huggard, have developed a mathematical model of the Tilt-A -Whirl. By integrating the equation of motion, they find that the Tilt-A -Whirl is, indeed, a chaotic system. You really cannot tell what the car is going to do -- even if you take your laptop along with you! (Kautz, R.L ., and Huggard, Bret M.; "Chaos at the Amusement Park: Dynamics of the Tilt-A -Whirl," American Journal of Physics, 62:59, 1994.) From Science Frontiers # ...
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... Science Frontiers ONLINE No. 137, Sep-Oct 2001 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Alaska's "Mummy People", Where they Ainus? Granite-Working in Ancient Egypt Astronomy The Ashen Light of Venus Martian "Flares" Solar Model Confirmed, But Standard Model Crippled Biology Bird's Eggs as Information Carriers Unexpected Signals Within Life Forms Mysterious Losses and Acquisitions of Color Vision Geology Fuzz in the Climate Record The Missing Helium Geophysics The Long Reach of the Hawaiian Islands The Ship-Swallowers An Expanding Semicircle of Light in the Night Sky Psychology Phantom Bodies Sex and TGA Unclassified Something Rotten at the Core of Science Luck or Fate? ...
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... reported in 1900 by A.E . Douglass, at the Lowell Observaory. The popular press quickly announced that the Martians were signalling us. Actually, this assumption was quite understandable because in those days the newly discovered Martian "canals" were in everyone's thoughts. Most scientists, however, rejected the signal notion preferring to attibute the flare to the specular reflection of sunlight from snowy peaks on Mars. But they were wrong, too. Close-up inspection by modern spacecraft has revealed no snowy peaks or large bodies of water on Mars that might mirror the sun. But another possibility has now come to the fore. The Martian flares could be reflections of sunlight from flat, hexagonal crystals of water ice in the thin Martian clouds; the same crystals that create some of the solar halos and sun dogs seen on earth. That this sort of specular reflection does occur was demonstrated on June 7, 2001, when a flare was actually photographed in the area of Edom Promontorium. The photography was possible because scientists had been watching this spot intently -- with cameras at the ready -- because a well-observed flare had occurred at this location in 1954, and calculations showed that conditions would be just right for the sun to be again reflected by clouds at this spot on June 7, 2001. It was a prediction that came true. Sunlight reflected from Martian clouds cannot be the total answer, though. An area called Tithonius Lacus, for example, is the source of many flares, but it is too cold in this part of Mars for clouds of ...
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... Science Frontiers ONLINE No. 55: Jan-Feb 1988 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Archeological Stonewalling and Shadow Science Curious Sand-filled Cavities in the Great Pyramid Sardinia's Prehistoric Towers Demystifying Those Australian Craters Early Boomerang Astronomy An Astronomical Paradox Why Do Spiral Galaxies Stay That Way? Or Do They? Biology Migrating Birds Collide with Magnetic Bump The Scientific Basis of Astrology The Ubiquity of Sea Serpents A Glitch in the Evolution of Whales Geology Do We Really Understand the Dinosaurs? Cyclothems As Solar-system Pulse Recorders Geophysics Wheels of Light: Sea of Fire Powerful Concentric Waves The Zeitoun Luminous Phenomena Presumed Ball Lightning Things That Bo Buzz in the Night Psychology Psyching Out Piezoelectric Transducers Goethe's Optics Reevaluated ...
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... Science Frontiers ONLINE No. 67: Jan-Feb 1990 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology New world culture old Fantastic claim by explorer Archeological riddle The ancient-humans-in-europe controversy Astronomy Direct observations of hyperion's chaotic motion A NEW QUASAR DISTANCE RECORD: A NEW EMBARRASSMENT Explaining lunar flashes with life-savers Astronomers up against the "great wall" Biology Dna on cell surfaces Really-deep rivers Geology We live atop a chemical retort Australasian tektites coughed up by a moon of jupiter? Microorganisms complicate the k-t boundary Continuity at the conrad discontinuity Geophysics Eyewitness account of cropcircle formation Possible ball lightning in ankara Psychology Solar activity and bursts of human creativity Geomagnetic activity related to mental activity Psychotherapy may delay cancer deaths Physics A WATCHED ATOM IS AN INHIBITED ATOM General A HUNGARIAN UFO ...
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... Science Frontiers ONLINE No. 32: Mar-Apr 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Mysterious Object Winnipeg, Manitoba. "On January 14, 1983, I observed a perfectly round black orb crossing the sun. It started at 17h 54m 23s Universal Time and ended at 17h 54m 26s Universal Time and lasted three seconds. On a projected solar disk with a diameter of 18 centimetres, the object had a diameter of one-half centimeter." (Lohvinenko, Todd; "A Mysterious Object," Royal Astronomical Society of Canada, National Newsletter, 77:L19, 1983.) Comment. This object traveled too fast to be an intramercurial planet; too slowly for a meteor. Path taken by the black spot cross the face of sun. From Science Frontiers #32, MAR-APR 1984 . 1984-2000 William R. Corliss ...
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... between 8 and 16 feet in size. These previously undetected bodies match Frank's predictions concerning the speed, direction and number of pro posed comets flying by earth, says Yeates, a scientist at the Jet Propulsion Laboratory in Pasadena, Calif. " (Monastersky, R.; "Cometary Controversy Caught on Film," Science News, 133:340, 1988. See also: Hecht, Jeff; "Snowballs from Space 'Filled Earth's Oceans'," New Scientist, p. 38, May 12, 1988.) Comment. Now all this does not mean that Frank's hypothesis is proven in the eyes of all scientists. Far from it, there is too much at stake; namely, our whole view of the small-scale structure of the solar system and, even more important, the heretical notion that the earth's oceans have slowly filled with extraterrestrial water. It has not been an easy two years for Frank. His reputation has been at risk. Huyghe hinted at this when he recorded Frank's reactions to the new photographic evidence: "Looking at the data, seeing those streaks, has made a lot of people's hearts stop," says Frank. He is thrilled at this result, but he dreads what will follow. "For the past two years I paid the price for being wrong. Now I'll pay an equal price for being right. After all, you can't just tip the scientific world askew and expect everyone to cheer." From Science Frontiers #58, ...
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... which lasted about 15 years. Clearly, something dramatic had happened. "There are two possibilities: a huge volcanic eruption or a collision between the Earth and a solid object: an asteroid or comet. Ice-cores drilled from Greenland show no evidence of large-scale volcanic activity at that time, so Professor Baillie and others now believe a cosmic impact is more likely. The result would have been to throw up a huge veil of dust and debris, cooling the Earth and producing widespread crop failures." (Anonymous; "Raining Death and Dark Ages," London Times, July 27, 1994. Cr. A. Rothovius) In the scientific literature, Baillie has elaborated on the cosmic-projectile theme, adding that the dust veil could also have been created when the solar system passed through a cloud of cosmic dust. (Baillie, M.G .L .; "Dendrochronology Raises Questions about the Nature of the AD 536 Dust-Veil Event," The Holocene , 4:212, 1994. Cr. L. Ellenberger) Comment. The scientific literature hints of dust-veil events in more recent times: (1 ) the white-sky phenomenon of 1912; and (2 ) the "dry fog" of 1783. See details in GWC1 and GWD4 in Tornados, Dark Days, etc. Ordering information here . From Science Frontiers #96, NOV-DEC 1994 . 1994-2000 William R. Corliss ...
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... a factor of four as it rotates Its diameter, according to M.W . and B.E . Schaefer (Nature, 333:436, 1988) is thought to be at least 660 kilometers. None of these facts taken alone is anomalous, but (2 ) and (3 ) taken together seem incompatible. If the large brightness changes are due to a highly irregular shape, Nereid's 660-kilometer size is too large, because astronomers agree that gravitational forces will sphericize all objects larger than 400 kilometers. On the other hand, if Nereid is two-faced, like Saturn's moon Iapetus (it's carbon-black on one side, light-colored on the other), astronomers are again faced with trying to explain how such a large solar-system object can acquire so much carbonaceous material on one side only. Also, Nereid's eccentric, retrograde orbit surely hints at a history of capture or orbit disruption. (Weisburd, S.; "Neptune's Nereid: Another Mysterious Moon," Science News, 133:374, 1988. Also: Veverka, J.; "Taking a Dim View of Nereid," Nature, 333:391, 1988.) From Science Frontiers #59, SEP-OCT 1988 . 1988-2000 William R. Corliss ...
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... NEW EMBARRASSMENT A quasar has been detected with a redshift of 4.73. If this redshift is interpreted as a measure of the quasar's distance (Who would risk his reputation by suggesting otherwise?), it is 14 or billion light years away. If the Big Bang is assumed (Who would risk..etc?), this quasar is only about a billion light years from the edge of the universe. Its age, then, is only a billion years. But this stripling of a quasar appears perfectly "normal" with no signs of youth! Its spectrum indicates that even at this young age, the elements were present in the same abundances found in older quasars. And, of course, at this quasar's core there must be a billion-solar-mass black hole (Who would risk..etc.?). Current theory is hardpressed to explain this very rapid evolution of a "normal" quasar with its immense black hole. (Peterson, I.; "Quasar Illuminates the Most Distant Past," Science News, 136: 340, 1989.) Comment. Could it be that our fanatically held ideas about redshifts, black holes, and Big Bangs are wrong? You bet it could! Reference. The redshift controversy the the anomalies that create it are cataloged in: Stars, Galaxies, Cosmos. Ordering information here . From Science Frontiers #67, JAN-FEB 1990 . 1990-2000 William R. Corliss ...
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... Online All Issues This Issue Sourcebook Project Sourcebook Subjects Direct observations of hyperion's chaotic motion Hyperion is a 150-kilometer-diameter satellite of Saturn. Hyperion's irregular shape and the gravitational pull of Titan, a larger satellite of Saturn, make it a prime candidate for chaotic motion. After accumulating 53 Hyperion-days of observation, J. Klavetter has confirmed this theoretical suspicion. Hyperion's brightness varies wildly from day to day, as it spins unpredictably. The laws of motion and the largest computers are helpless here; although computer simulation can identify situations where chaos might develop. More alarmingly, some "subtle" chaos also appears in computer simulations of Pluto's motion and "perhaps other planets." (Kerr, Richard A.; "First Direct View of Solar System Chaos," Science, 246: 998, 1989.) Comment. Contemplate what might happen -- or might have happened already -- if any of the other planets moved chaotically. From Science Frontiers #67, JAN-FEB 1990 . 1990-2000 William R. Corliss ...
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... model prevails; and the young geological age of the tektites is dismissed as erroneous. A Soviet scientist, E.P . Izokh, has recently proposed a radically different scenario that would produce both the young and old dates. If a moon, or Jupiter, or some similar body, explosively ejected the glassy tektites, embedded in an icy cometary body some 700,000 years ago, the tektites could, after cruising through space for millenia, have fallen to earth recently and over a wide area. Thus, both geologists and geophysicists would be satisfied! (Sullivan, Walter; "New Answer Proposed for Tektites: A Comet," New York Times, November 28, 1989. Cr. R. Adams) Comment. Russian scientists have long suggested that comets may be ejected from solar-system bodies and have been laughed at by American scientists for their trouble! Reference. For more on tektite anomalies, refer to category ESM3 in our catalog: Neglected Geological Anomalies. Ordering information here . An Ablation-sculpted australite, one type of Australian tektite. From Science Frontiers #67, JAN-FEB 1990 . 1990-2000 William R. Corliss ...
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... of a distant planet. Scrutinizing Mercury with their big electronic "ears," they have found two spots on the plamet where the temperatures are several hundred degrees higher than in the surrounding areas. Actually, these hot spots are easy to understand; because, to a Mercurian, the sun comes to a stop in the sky over one of these points and then moves backwards to the other point 180 away. As the sun tarries over these two spots, it heats them preferentially. The strange apparent motion of the sun is due to the 3:2 ratio between Mercury's period of revolution around the sun (88 days) and its axial spin period (59.6 days). What is surprising is that the energy detected radiating from the two hot spots is all reradiated solar energy; that is, there seems to be no contribution at all from Mercury's core! If no heat is leaking out of Mercury's core, the core itself is very likely solid. If it is solid, it cannot establish convection cells and thus generate a magnetic field through dynamo action. But back in 1975, the Mariner 10 spacecraft radioed back that Mercury actually does possess a magnetic field, and a surprisingly large one at that. (Wilford, John Noble; "Theory of Mercury's Hot Poles Is Shown to Be a Fact," New York Times, June 13, 1990. Cr. J. Covey.) Comment. Something is clearly awry. This inconsistency could mean that the dynamo theory presumed to be responsible for planetary magnetic fields is ...
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... Science Frontiers ONLINE No. 2: January 1978 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology The Stone Enigmas of New England Astronomy Sun-Earth-Moon System May Not Be Stable Changes in Solar Rotation Biology Hopeful Monsters Rather Than Gradual Evolution? Hedgehogs Use Toad Venom for Defense Blind Man Runs on Lunar Time Infections From Comets Geology Will Radiohalos in Coalified Wood Upset Geological Clocks? How Real Are Biological Extinctions in the Fossil Record? Geophysics Another Indian Ocean Light Wheel Ghostly White Disk and Light Beam in Sky Fast-moving Dark Bands Cross Halo The Morning Glory Giant Ball Lightning Psychology Does Man Survive Death? ...
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... under control. But the discharge paths followed by lightning strokes often seem unnecessarily tortuous when more direct routes are readily available. The mechanism by which large reservoirs of unlike charges are built up is also obscure. Cosmic rays have now been pro-posed as both a source of charged particles and a provider of low-resistance ionized conduits for lightning to follow. Primary cosmic rays carry considerable energy, most of which appears near the earth's surface in the form of cascades of secondary particles that create complex ionized tracks as they penetrate the dense lower atmosphere. Lightning bolts would tend to follow these precursors along their crooked trails. (Anonymous; "Do Cosmic Rays Trigger Lightning Discharges?" New Scientist, 77:88, 1978.) Comment. Thunderstorm frequency has often been linked to solar activity, and cosmic rays could provide the connection. Could meteorites or "thunderbolts" do likewise? From Science Frontiers #3 , April 1978 . 1978-2000 William R. Corliss ...
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... 1979 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Iridium And Mass Extinctions Alvarez and his colleagues at the University of California, while chemically analyzing a series of sedimentary strata from Italy, discovered that one layer had 25 times the concentration of iridium residing in adjacent strata. The iridium-rich layer forms the boundary between the Cretaceous and Tertiary periods, 65 million years ago. During that death-filled interval, 50% of the earth's genera were wiped out. Such are the two correlated facts: iridium increase and mass extinction. But do they have the same cause? Alvarez et al point out that iridium is rare on earth but much more common out in space. The anomalous concentration of iridium could have been injected by a massive solar flare, a big meteor impact, or come other extraterrestrial catastrophe. Thus is catastrophism being resurrected. (Anonymous; "An Iridium Clue to the Dinosaur's Demise," New Scientist, 82: 798, 1979.) From Science Frontiers #8 , Fall 1979 . 1979-2000 William R. Corliss ...
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... has been discovered on an isolated butte in New Mexico. Here, the Anasazi, who occupied Chaco Canyon between 400 and 1,300 A.D ., carved spiral petroglyphs into the face of a cliff. Then, they arranged stone slabs so that sharp slivers of sunlight fell on the spirals. The precise position of the sliver of light depends of course upon the location of the sun. The solstices and equinoxes are registered by unique configurations of light slivers and spirals. In contrast to other calendar sites, which rely upon the rising and setting points of sun on the horizon, the New Mexico clock depends upon the altitude of the sun at midday. Slivers of moonlight on the spirals also seem to have astronomical significance. (Sofaer, Anna, et al; "A Unique Solar Marking Construct," Science, 206:283, 1979.) Reference. Our Handbook Ancient Man contains much additional material on archeoastronomy. For a description of this large volume, go to: here . From Science Frontiers #10, Spring 1980 . 1980-2000 William R. Corliss ...
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... or an aircraft, Morisette pulled off the road and got out. To his surprise, it was a formation of five or six meteors cruising leisurely toward the north on parallel paths. This fascinating spectacle lasted about 15-20 seconds -- long as meteor events go. The fireballs disappeared simultaneously. No sounds were heard during or after their passage. (Morisette, Gartan; "Escadrille de Meteores," Astronomie-Quebec , July-August 1991. Cr. F. St. Laurent) Comment. The slow progress and disciplined motion of the Quebec meteors remind one of the famous meteor procession of February 9, 1913, which was also a predominantly Canadian event. However, the 1913 procession headed southeast over the northeastern states and out into the Atlantic. See AYO7 in Sun and Solar System Debris. This catalog volume is described here . From Science Frontiers #79, JAN-FEB 1992 . 1992-2000 William R. Corliss ...
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... or guts. Their bodies are covered with thousands of feathery tentacles, each packed with blood vessels. Apparently, the tube worms extract nutrients directly from the sea water and expel wastes the same way -- having in effect external stomachs. These worms, which may be many feet long, contain enzymes that permit them to extract carbon dioxide from the seawater and fix it much like plants do during photosynthesis. George Somero, at Scripps, estimates that the enzyme levels in the worms are similar to those in a spinach leaf. (Anonymous; "15-Foot Sea Worm Has Plant Qualities," San Diego Evening Tribune, May 22, 1980. UPI dispatch) Comment. This curious biological anomaly developed in an ecological niche where the primary energy source for sustaining life is geothermal rather than solar. How did this remarkable situation arise? Do the tube worms have relatives in the fossil record showing a step-by-step development of inside-out stomachs? From Science Frontiers #14, Winter 1981 . 1981-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 17: Fall 1981 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Mysteries Around Uranus August 15, 1980. European Southern Observatory, La Silla, Chile. Using the 3.6 -meter reflector and a photoelectric detector, astronomers recorded the occultation of a star by Uranus. The currently recognized rings of Uranus were duly noted as they dimmed the star's light, but so did seven other "objects." Observers at Las Campanas and Cerro Tololo, who were also monitoring the occultations, did see the seven extra occultations of the star. Clouds and faulty equipment have been ruled out. No one knows what caused the anomalies, (Anonymous; "More Mysteries of Uranus' Rings," Solar System Today, 3:56, 1981.) From Science Frontiers #17, Fall 1981 . 1981-2000 William R. Corliss ...
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... Subjects The Long Arms Of Venus And Jupiter Many times in the two or three "scientific" centuries now behind us, investigators have discovered, almost against their wills, that the moon and planets affect the earth. The moon's influence is understandable, but the planets are too far away for their gravitational fields to influence one terrestrial dust mote. Well, here is one more study showing that the planets (Venus and Jupiter, in this case) do affect the peak electron density in the earth's ionosphere. The effect is most noticeable when these planets are close to earth and dwindles as they swing around to the other side of the sun. The authors are at a loss to explain this effect in terms of gravitation, suggesting that perhaps Venus or Jupiter may instead affect solar activity, which in turn modifies the terrestrial ionosphere. (Harnischmacher, E., and Rawer, K.; "Lunar and Planetary Influences upon the Peak Electron Density of the Ionosphere," Journal of Atmospheric and Terrestrial Electricity, 43:643, 1981.) Comment. Actually, no one has shown how the planets can possibly influence the sun with known action-at-a -distance forces. Electrical forces are taboo. There are no other "recognized" forces. From Science Frontiers #18, NOV-DEC 1981 . 1981-2000 William R. Corliss ...
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... superorganism," the termite colony. That termites had bugs in-side them has long been known; but the new-found complexity and interdependency of life systems within life systems is remarkable. The researchers believe that the life forms inside the termite work together to create the uniform internal environment needed by all inhabitants, just as the termites themselves cooperate to maintain a favorable environment inside their hill. (Anonymous; "And Littler Bugs Inside 'Em," Scientific American, 246:78, February 1982.) The termites, though, are only part of a much larger ecosystem, the earth itself. J.E . Lovelock, in his Gaia, A New Look at Life On Earth, has observed that our planet's environment has actually changed little down the eons despite solar variations. Lovelock's hypo thesis is that all terrestrial life -- animals, plants, termites, etc -- work sym biotically to maintain planetary temperatures, atmospheric constituents, etc., conducive to life, just like the termite's internal residents on a much smaller scale. The Gaia concept was restated by R.A . de Bie in a letter to Nature about the possibility of life in outer space. He observes that terrestrial life, according to Gaia-thought, will naturally develop a species that can carry life off the planet to new and safer environs. Humankind, of course, is the first attempt we know of to create such an agent. Other planetary systems might have differently constituted agents. (de Bie, Roeland A.; "The Ultimate ...
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... Science Frontiers ONLINE No. 86: Mar-Apr 1993 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology The acoustics of rock art Where did agriculture really begin? Astronomy Meteoric "dust bunnies" Cosmic snowballs and magnetic asteroids Biology Must we die? the medfly's answer How a fly hears what a cricket hears Once more science fiction predicts the future! Rethinking aids Geology Geysers as detectors of distant earthquakes Precariously balanced rocks as earthquake detectors Geophysics An electrical virtuoso The milky sea a.k .a . "white water" A CURIOUS SIGHTING Cloud plumes natural but still a bit anomalous Logic and Mathematics Math's mystery All roads lead to 123 Psychology Hypnosis and skin temperature Hypnosis and basketball Physics Solar radiation and mental illness ...
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... Perhaps some type of 'cosmic dust bunny,' disrupted by air resistance, might be the cause of these events." These moving patches of light also resemble the "auroral meteors" cataloged under GLA3 in Lightning, Auroras, Nocturnal Lights. Physically, they might be related to the small, icy comets postulated by L.A . Frank to account for the transient "holes" seen in satellite ultraviolet images of the earth. (See SF#60 and #72 for more.) (Gallagher, John S.; "Diffuse Luminous Objects Having Angular Velocities Similar to Meteors," Strolling Astronomer , 36:115, 1992. Cr. P. Huyghe) References. The above phenomenon is cataloged in AYO8 under "Nebulous Meteors" in our book: The Sun and Solar System Debris. Ordering information for this book and Lightning, Auroras (mentioned above) may be found here . From Science Frontiers #86, MAR-APR 1993 . 1993-2000 William R. Corliss ...
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... publishing several hotly debated papers during this period. His latest contribution summarizes evidence supporting his contention that the earth has captured chunks of space debris, some of which have disintegrated, some of which are still in orbit amidst tons of artificial-satellite debris. The supporting observations have come from optical surveillance programs, tracking networks, radio-propagation anomalies, and (most interesting to the anomaly collector) old reports of bright objects near the sun (especially the August 1921 object) and the curious group of retrograde objects that passed over Germany in 1880. (Bagby, J.P .; "Natural Earth Satellites," British Interplanetary Society, Journal, 34:289, 1981.) Reference. Material on the August 1921 object is cataloged at AEO1 in our book: The Sun and Solar System Debris. To order, visit: here . From Science Frontiers #21, MAY-JUN 1982 . 1982-2000 William R. Corliss ...
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... analogous to optical pumping in laboratory lasers were taking place and led to the coining of the term 'natural lasers.' Now, Deming and colleagues from the Goddard team have taken new observations of emission from Mars and Venus at wavelengths near 10 micrometers. and modelled them to show that stimulated emission -- the effect which makes lasers so powerful -- accounts for up to seven per cent of the total emission. This is not a large amplification factor by laboratory standards, particularly for a CO2 laser. But, the authors speculate that the sheer size of the natural lasers could make them useful tools in the future for communicating with distant civilizations beyond our own planetary system." The atmospheres of Mars and Venus are almost pure CO2 . The CO2 molecules are excited by the absorption of energetic solar photons; then, thermally emitted photons at about 10 micrometers from lower reaches of the atmosphere collide with the excited molecules, stimulating them to emit another 10-micrometer photon, thus doubling the number of photons. This is typical laser action. Deming and Mumma speculate that the natural laser action existing in the Martian atmosphere could be intensified and focussed into an intense beam of infrared radiation of enormous power by placing two large mirrors in orbit, creating a space-borne analog of a laboratory laser. With this huge laser, one could conceive of communicating with neighboring stellar systems. (Taylor, F.W .; "Natural Lasers on Venus and Mars," Nature, 306:640, 1983.) From Science Frontiers #32, MAR-APR 1984 . 1984-2000 ...
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... events, abrupt changes in sea-floor spreading, ocean-anoxic and blackshale events and the largest evaporite deposits) have been synthesized (with estimated errors). These events show evidence for a statistically significant periodic component with an underlying periodicity, formally equal to 26.6 Myr, and a recent maximum, close to the present time. The cycle may not be strictly periodic, but a periodicity of 30 Myr is robust to probable errors in dating of the geologic events." The obvious question is: What could cause a 30-million-year periodicity? Internally, the earth's innards might be periodic, possibly in terms of plume eruption, mineral phase changes, core convection, etc. Externally, comets and asteroids are cyclic. Rampino and Caldeira point out that the solar system crosses the heavily populated plane of the Galaxy every 30 million years. (Rampino, Michael R., and Caldeira, Ken; "Major Episodes of Geologic Change: Correlations, Time Structure and Possible Causes," Earth and Planetary Sci ence Letters , 114:215, 1993.) Reference. We catalog crater periodicity in ETC4 in Carolina Bays, Mima Mounds. This catalog described here . From Science Frontiers #87, MAY-JUN 1993 . 1993-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 33: May-Jun 1984 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Comet Puffs A Smoke Ring When the periodic comet Kopff was photographed on August 13, 1983, using the 4-meter Mayall reflector at Kitt Peak, the black-and-white photo showed nothing out-of-the-ordinary. But digitization and computer enhancement revealed a previously unnoticed cloud of matter -million miles long trailing the nucleus. Curiously, the cloud resembled a huge smoke ring -- a distinct departure from the long, flowing tails shown in the textbooks. (Anonymous; "The Unusual Dust Cloud of Comet Kopff," Sky and Telescope, 67:226, 1984.) Comment. Obviously forces other than the solar wind were at work here. From Science Frontiers #33, MAY-JUN 1984 . 1984-2000 William R. Corliss ...
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... disagree. They say the oldest stars are much older, perhaps 16 to 19 billion years old. Because the oldest stars can't be older than the universe in which they lie, this age paradox presents a thorny problem for astronomers." At least two solutions to the paradox are possible: (1 ) The cosmological distance scale used to determine the age of the universe is incorrect; and/or (2 ) Our theories about how stars work and evolve are in error. Something has to give. (Jayawardhana, Ray; "The Age Paradox," Astronomy, 21:39, June 1993.) Comment. Also pertinent here are H. Arp's collection of red-shift anomalies, which also call into question the cosmological distance scale; and those missing solar neutrinos, which cast doubt on our ideas about how stars work. H. Arp's redshift anomalies are cataloged in AQB and AWB in our catalog: Stars, Galaxies, Cosmos. To order, see: here . From Science Frontiers #89, SEP-OCT 1993 . 1993-2000 William R. Corliss ...
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... yards, they encountered millions of small rays of "lightning" flashing everywhere. They were 2-3 feet long and reached high into the sky. Looking back toward the car, they saw a reddish fluorescent glow with streams of light coming down from the sky to the glowing region. Grass and weeds along the roadside were standing straight up and glowing. Deep-red lines of light were seen dancing on the road. They returned to the car, and it felt hot to the touch! Soon, clouds moved in and the display was over. The authors of this article personally investigated this event within a few days of its occurrence. They found the two witnesses obviously very shaken, but believe that the accounts are fresh and unadulterated. Also pertinent is the fact that a large solar flare had just occurred, and intense auroral displays had been predicted. Also, the two women were apparently the only witnesses of this phenomenon. (Swords, Michael D., and Curtis, Edward G.; "Atmospheric Light Show," Pursuit, 16:116, 1983.) Comment. The article also contains the authors' analysis in some depth. Basically, they thought the phenomenon to be auroral with coincidental rainfall containing organic debris. Reference. Many other low-level auroras are described in GLA4 in Lightning, Auroras. This Catalog is described here . From Science Frontiers #34, JUL-AUG 1984 . 1984-2000 William R. Corliss ...
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... Americans, particularly the Maya. That the Maya were acute astronomers is beyond question. They had even developed a correction scheme to keep Venus' 584-day canonical cycle on track with its true synodic period of 583.92 days. Their predictions of the position of Venus were accurate to 2 hours in 481 years! Not bad for a civilization that did not seem to have any conception that the planets revolved around the sun. The Maya, in fact, did not seem to care what made heavenly bodies move; they only wished to predict their appearance accurately. Instead of developing celestial mechanics based on gravitation and laws of motion, as we have done, they were content with numerical algorithms; that is, ways of computing a desired result. Their astonishingly accurate predictions of Venus, solar eclipses, and other astronomical phenomena evolved from cycles of numbers advancing each day like interlocking gear teeth. These algorithms gave them no insight into cause and effect, but they got the right answers. They needed no physical laws, just patterns of numbers. It was a different way of comprehending and dealing with the universe. (Aveni, Anthony F.; "Native American Astronomy," Physics Today, 37:24, June 1984.) Reference. For much more on archeoastronomy, consult our Handbook Ancient Man. Details here . An early drawing of the Big Horn medicine wheel in Colorado. It is actually not quite this regular. From Science Frontiers #35, SEP-OCT 1984 . 1984-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 90: Nov-Dec 1993 Other pages Home Page Science Frontiers Online All Issues Last Issue Next Issue Sourcebook Project Sourcebook Subjects Contents Archaeology Missing: 500,000 tons of copper Ancient romans in texas? Astronomy A NEW CLASS OF SOLAR SYSTEM OBJECTS Einstein questioned Alien meteors Biology The shorter, the stranger A TALE OF TWO NOSES Smouldering corpse not shc Depths of ignorance Geology The ktb hole Geophysics Mystery light flashes above storms A PIECE 'A HEAVEN! Band of turbulence Can thunderstorms stall cars? Dune circles of sossusvlei General Is nothing certain anymore? Physics Lines of maser spots ...
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... A French team of scientists, led by Jean Lecacheux, has determined that Halley's Comet flares up at regular intervals just over 24 hours apart. We usually do not study comets carefully until they are very close to the sun, so we don't know if this blinking behavior is typical or not. The most reasonable explanation is that Halley's Comet rotates about every 24 hours and that its surface is not uniform. One portion of its surface may be brighter or emit more luminous gases than the rest. In any event, we have a new astronomical curiosity. (Lloyd, Andrew; "Halley's Comet Is Blinking," New Scientist, p. 20, May 24, 1984.) Reference. Cometary outbursts are cataloged at ACO20 in The Sun and Solar System Debris. This Catalog volume is described here . From Science Frontiers #35, SEP-OCT 1984 . 1984-2000 William R. Corliss ...
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... in a nearly circular orbit is considered too improbable. (3 ) Earth-moon accretion as a double planet . The compositions of the earth and moon are too different. This article concludes that the resolution of the problem of lunar origin must await our return to the moon for more scientific exploration. (Rubin, Alan E.; "Whence Came the Moon?" Sky and Telescope, 68:389, 1984.) An article in Science also discusses the classical theories of lunar origin and quickly disposes of them for the above reasons. However, a fourth theory makes an appearance, which we might call the Big Splash Theory. The idea is that a Mars-sized object (1 /10 the earth's mass) made a grazing collision with the earth when the solar system was more heavily populated with debris. This collision vaporized the projectile's rocky mantle as well as a similar quantity from the earth. This material was flung into orbit by the force of the impact and the expanding hot gases. Beyond the Roche Limit, the expelled debris coalesced into the moon. This fourth theory is now seriously considered by planetary scientists who -- so far -- have found no serious defects. (Kerr, Richard A.; "Making the Moon from a Big Splash," Science, 226:1060, 1984.) From Science Frontiers #37, JAN-FEB 1985 . 1985-2000 William R. Corliss ...
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... still another discontinuous ring at a different radius. A third discontinuous ring seems to be indicated by the reanalysis of some 1968 occultation data. Astronomer Bill Hibbard, at the University of Arizona, speculates that the three separate arcs of material orbiting Neptune are "trying to decide whether to become a satellite." (Hecht, Jeff, and Henbest, Nigel; "Neptune's Arcs -- A Satellite in Formation?" New Scientist, p. 19, Apil 25, 1985.) Comment. If the debris around Neptune is just now accreting into satellites and Saturn's rings really do have youthful features (SF#39), one has to consider some disquieting possibilities: (1 ) Saturn and Neptune have been recently "disturbed," or (2 ) The entire solar system is not as old as the conventional scenario demands. From Science Frontiers #40, JUL-AUG 1985 . 1985-2000 William R. Corliss ...
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... test would be killed in times on the order of hundreds of years -- far too short for panspermia to work at interstellar distances. However, if the spores are transported in dark, molecular clouds, which are not uncommon between the stars, survival times of tens or hundreds of million years are indicated by the experiments. Under such conditions, the interstellar transportation of life is possible. But perhaps the injection and capture phases of panspermia might be lethal to spores. Weber and Greenberg think not -- under certain conditions. The collision of a large comet or meteorite could inject spores from a life-endowed planet into space safely, particularly if the impacting object glanced off into space pulling ejecta after it. The terminal phase, the capture of spores from a passing molecular cloud by the solar system and then the earth, would be nonlethal if the spores were somehow coated with a thin veneer of ultraviolet absorbing material. In sum, the experiments place limits on panspermia, but do not rule it out by any means. (Weber, Peter, and Greenberg, J. Mayo; "Can Spores Survive in Interstellar Space?" Nature, 316:403, 1985.) Comment. Weber and Greenberg do not discuss the possible existence of dense, low-temperature regions in molecular clouds where conditions might be conducive to the development of large molecules. Does life have to have the proverbial warm, sunlit pond to develop? From Science Frontiers #42, NOV-DEC 1985 . 1985-2000 William R. Corliss ...
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... the earth's upper atmosphere, friction with the air causes them to incandesce and burn up. The smaller ones are completely consumed. A few bigger ones reach earth and are renamed "meteorites." So far, all of this is well-understood. But when meteors begin to burn up much above 100 kilometers, a problem arises. The air there is normally much too thin to cause incandescence and burn-up. Observational anomalies are abundant. Two Leonid fireballs were seen glowing at 160 kilometers by Japanese scientists. In 1998, a Dutch team in China detected bright Leonids at 200 kilometers! In addition, some Russian reentering space-craft began glowing well above 100 kilometers. ANAL is a solid phenomenon. Of course, the density of the upper atmosphere does increase somewhat when solar activity is high. Atmospheric gravity waves can also cause the atmosphere to bulge out. But these effects are inadequate to explain all observations. R. Spalding, at Sandia National Laboratories, ventures that ions in the upper atmosphere are electrostatically attracted to meteors and create light when they collide with them. A. Ol'khovatov suggests that "plasma instabilities" may be involved. To learn more about these, go to the latter's web site at: www.geocities.com/CapeCanaveral/Cockpit/3240/ (Ol'khovatov, Andrei; "Anomalous High Altitude Luminosity," Meteorite!, 6:18, May 2000.) Comments. AHAL remains unexplained. Interestingly enough, ANAL occurs at the same high altitudes where some meteors are heard on the ground, ...
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... 1986 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Polar Bear Coats Are Thermal Diodes "A polar bear's hairs are completely transparent. The bear appears white because visible light reflects from the rough inner surface of each hollow hair. However, the hairs are designed to trap ultraviolet light. Like light within an optical fiber, the radiation is conducted along the hairs to the skin. This summertime energy supplement provides up to a quarter of the bear's needs. Thus, even while actively pursuing prey, the bear can still concentrate on building up its blubber layers in preparation for winter." In other words, the bear's fur lets heat in but not out -- in effect a thermal diode. (Anonymous; "Solar Bear Technology," Science News, 129:153, 1986.) Comment. How come polar bears are favored with this "marvelous adaptation" while the arctic foxes and other mammals shiver? From Science Frontiers #45, MAY-JUN 1986 . 1986-2000 William R. Corliss ...
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... been terrestrial dust but interplanetary dust. Let us commence with long-winged U2s cruising at 20 kilometers altitude or more. Collectors coated with silicone oil are deployed. To them stick tiny bits of interplanetary and interstellar debris that have been caught by earth's gravity and are slowly drifting downward in the atmospshere. Some of these micron-sized particles come from asteroid collisions; others from the disintegration of comets. This rain of cosmic matter is not negligible; the earth harvests about 40,000 tons annually from the fertile fields of outer space. "Fertile?" Yes, outer space is a vast biochemical retort. D. Brownlee, R. Walker, and others: ". .. suggest that interplanetary dust has probably carried organic matter to Earth since the early aeons of the solar system. The complexity of the organic molecules found on these particles has fueled the imaginations of many who ponder the role extraterrestrial matter may have played in the prebiological evolution of organic material on the primordial Earth." Beyond these conjectures, several other things about interplanetary dust particles bother scientists: "' What is surprising,' Walker notes, 'and still not understood, is the fact that the organic molecules we see in the dust particles are different from those previously seen in meteorites.' Another enigma is the observation of striking isotopic anomalies -- large enrichments of deuterium relative to hydrogen, as much as ten times greater than one sees in terrestrial samples -- in the particles in which Zare's group observed the organic molecules." Yes, the original dust of life may ...
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... Science Frontiers ONLINE No. 132: NOV-DEC 2000 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Theories that are Hard to Believe Explain Things We Cannot See That "something" we cannot see is that astronomical fudge factor called "dark matter". Astronomers are sure it exists because its presence, though unseen, explains two anomalies: The high circular velocity of the stars and gas in the outer reaches of galaxies. Circular velocities should decrease with distance from the galactic center, just as planet velocities do in the solar system. They don't , so some gravitational force from some unseen mass must counterbalancing centrifugal force (mark that this is presumptious! The "force" need not be gravity.) Observations suggesting that galaxies formed when the universe was less than a billion years old. The gravitational pull of the visible mass is inadequate to cause this clumping so quickly in the history of the universe. Many candidates have been proposed to play the dark-matter role. One of the more popular possibilities is that vast sea of neutrinos pervading the cosmos -- if they really do display just a hint of mass. Two other candidates now on the table are so bizarre that we marvel at the ingenuity of the theorists. One involves exceedingly large particles, the other unbelievably tiny clumps of particles. At the "giant" end of the size spectrum are galaxy-size particles weighing only 10-24 as much as an electron, which is itself by no means large. It would be hard to experimentally distinguish such ...
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... rocks,' said Howard Klein, who headed the biological experiments on board Viking. Living microorganisms have been found just below the surface of rocks in Antarctica, Klein said." (Anonymous; Antarctica Hints at Why There May Be Fossils on Mars," New Scientist, p. 20, September 4, 1986.) Comment. It is curious that some of the meteorites picked up in Antarctica are thought to have originated on Mars and been blasted off by meteoric impacts. This observation leads to the speculation that terrestrial life might have been seeded from Mars -- meteoric panspermia! Are we all Martians? If you have hung on this far, you'll want to read about "Life as a Cosmic Phenomenon" just below. Also refer to our catalog: The Sun and Solar System Debris for material on the putative Martian meteorites. From Science Frontiers #48, NOV-DEC 1986 . 1986-2000 William R. Corliss ...
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... et al. The occurrence of grooves on Gaspra is consistent with other indications (irregular shape, cratering record) that this asteroid has evolved through a violent collisional history." (Veverka, J., et al; "Discovery of Grooves on Gaspra," Icarus, 107:72, 1994.) Comment. The pits along Gaspra's cracks, as on Phobos, suggest the violent expulsion of gases. Where could these gases have come from? "Sandblows" are sometimes formed during terrestrial earthquakes as natural gases and other fluids are squeezed out of the earth's porous outer crust. Could Gaspra harbor primordial methane? If so, is it biogenic or abiogenic? Reference. An entire chapter on the anomalies of asteroids can be found in our catalog: The Sun and Solar System Debris. Details here . From Science Frontiers #94, JUL-AUG 1994 . 1994-2000 William R. Corliss ...
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... 2.2 -day period with a 7.4 -day wobble superimposed. (Kerr, Richard A.; "Halley's Confounding Fireworks," Science, 234:1196, 1986. Also: Campbell, Philip; "How Fast Does Halley Spin?" Nature, 324:213, 1986.) Halley's fireworks (visible outbursts) have also stimulated comet model-making. The latest is an icy-glue construction of sorts. See the accompanying figure and the accurate but not-particularlyenlightening caption. (Gombosi, Tamas I., and Houpis, Harry L.F .; "An Icy-Glue Model of Cometary Nuclei," Nature, 324:43, 1986.) Reference. Cometary outbursts are cataloged in ACO20 on The Sun and Solar System Debris. For information on this book, visit: here . A section through the icy-glue model of cometary nucleus, showing active and inactive micropores, small boulders, and the outer dust covering. From Science Frontiers #49, JAN-FEB 1987 . 1987-2000 William R. Corliss ...
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... recent model, by P. Goldreich et al, envisions a necklace of arcs in orbit, as illustrated. They calculate that the resonant effects of a yet undiscovered satellite in an inclined orbit could produce this strange pattern. (Murray, Carl d.; "Arcs around Neptune," Nature, 324:209, 1986.) Comment. Voyager 2 will encounter Neptune in 1989. Hopefully, it will clear things up ringwise. Or, it may photograph something even more exotic, like some 2001-like monoliths in orbit!! A possible configuration for ring and arcs and a confining satellite in orbit around Neptune, according to the theory of Goldreich et al. Radial variations are exagerated. (Would any astronomer, even 10 years ago, have countenanced such a spectacle in the Solar System?) From Science Frontiers #49, JAN-FEB 1987 . 1987-2000 William R. Corliss ...
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... The comet's Fragment M, which was supposed to have vaporized in 1993, as comets are wont to do, apparently did not and left a scar on Jupiter like the other fragments. So, Shoemaker-Levi-9 had no discernible ice (unlike comets; it was fragile and easily fragmented (unlike rocky asteroids); and Fragment M did not have a coma (unlike comets but like asteroids)! Was Shoemaker-Levi-9 really a comet? (Roylance, Frank D.; "Is That Really a 'Comet' Hitting Jupiter?" Baltimore Sun, July 20, 1994. Roylance, Frank D.; "Fragment M's Reappearance Puzzles Astronomers," Baltimore Sun, July 22, 1994.) Reference. See our Catalog The Sun and Solar System Debris for more on the comet-asteroid question. Ordering information here . From Science Frontiers #95, SEP-OCT 1994 . 1994-2000 William R. Corliss ...
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... Wollin, at the Lamont-Doherty Geological Observatory, immediately predicted that a major snowstorm or flooding rains would hit northeastern states within six days. Wollin contacted the weather people in the region, but they discounted the prediction because satellite pictures and conventional weather indicators implied nothing of the sort. A three-day storm began on January 25, depositing 3 feet of snow in northern New England and 4 inches of rain along the coast from Washington to Boston. Wollin has had similar successes, without even looking at a weather map! Obviously, Wollin's forecasting techniques are not yet part of the Weather Bureau's arsenal. This is not too surprising because even Wollin does not understand why major storms should be preceded by several days by nervous magnetometers. He talks in a tentative way about solar storms, which do affect terrestrial magnetism, dumping energy into the oceans and thence into the atmosphere. But this is mainly speculation. Historically, we do know that long-term changes in the earth's magnetic field are linked to global temperature levels (see graphs); but here, too, cause and effect are not obvious. (Gribbin, John; "Magnetic Pointers to Stormy Weather," New Scientist, p. 70, December 25, 1986.) Long-term changes in global temperature follow changes in geomagnetic intensity. From Science Frontiers #50, MAR-APR 1987 . 1987-2000 William R. Corliss ...
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... Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Lightning Triggered From The Magnetosphere Whistlers are, as their name implies, curious whistling noises heard on radio receivers. They are caused naturally by lightning, which sends radio noise travelling through natural "ducts" in the earth's magnetosphere. It has recently been discovered that some of the whistlers are synchronized in a way that strongly suggests that some event high up in the magnetosphere triggers some lightning discharges far below near the surface. In other words, lightning is not always a product of activity in the lower atmosphere. (Armstrong, W.C .; "Lightning Triggered from the Earth's Magnetosphere as the Source of Synchronized Whistlers," Nature, 327:405, 1987.) Comment. Ball lightning has been correlated with solar activity and other extraterrestrial influences. See GLB17 in our Catalog Lightning, Auroras, Nocturnal Lights. This book is described here . From Science Frontiers #53, SEP-OCT 1987 . 1987-2000 William R. Corliss ...
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... Science Frontiers ONLINE No. 55: Jan-Feb 1988 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Why do spiral galaxies stay that way? or do they?Sometimes the simplest of observations produces the stickiest of dilemmas. Take, for instance, a well-formed spiral galaxy, of which there are a great many. When astronomers measure the circumferential velocities of the stars, as they circle around the galaxy's hub, they find that all the stars orbit at about the same velocity, regardless of how far out from the hub they are. Their speeds do not drop off with increasing distance, as the velocities of the planets do in the solar system. This observation is anomalous itself, because it seems that the laws of orbital motion have been violated. We will save this anomaly for another day, the one we are after now is called: The Winding Dilemma. N. Comins and L. Marschall elaborate as follows: "Stars closer to the center of a spiral galaxy don't have as far to go to complete an orbit as stars located farther from the center. Thus, inner stars should orbit more frequently than outer stars, resulting in a spiral that gradually winds up as the galaxy ages. But observations of spiral galaxies at various distances -- and thus at different stages in their evolution -- have shown that this is not the case. Astronomers believe density waves, stochastic star formation, or perhaps a combination of both processes may sustain or regenerate the spiral pattern." Density ...
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... , but its atomic weight is so high that temperatures exceeding 6000 K would be required to shoot matter out to 250 kilometers. Gold suggests that Io's volcanos get their firepower from electrical sources. He points out that Io short-circuits Jupiter's ring current periodically. Gold estimates that 5 million amperes flow through Io when it passes through the ring current. The energetic eruptions and caldera might therefore be electric-arc phenomena. The electrical energies available are sufficient to account for the observed outbursts. (Gold, Thomas; "Electrical Origin of the Outbursts on Io," Science, 206:1071, 1979.) Comment. Several scientists and non-scientists have proposed in the past that the sunspots and even some planetary craters result from large-scale electrical arcing within the solar system. Reference. Io is anomalous in several other ways. See our Section AJX in: The Moon and the Planets. To order, visit: here . From Science Frontiers #10, Spring 1980 . 1980-2000 William R. Corliss ...
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... : June 1979 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Post-eclipse brightening of io confirmed For about 15 minutes after Jupiter's satellite Io emerges from the planet's shadow after an eclipse, it unaccountably brightens far beyond its normal level. Observing Io with a spectrophotometer in 1978, F.C . Witteborn et al measured a brightness increase in the 4.7 -5 .4 micron range that was three to five times the brightness at other phase angles. Long a controversial phenomenon, this confirmation of Io's post-eclipse brightening has led to a search for possible explanations. Witteborn et al suggest that the transient flare-up is a complex thermoluminescent effect excited by interaction with Jupiter's magnetosphere, followed by solar heating as Io emerges from the shadow. (Witteborn, F.C . et al; "Io: An Intense Brightening near 5 Micrometers," Science, 203:643, 1979.) Comment. Io also modulates Jupiter's microwave emissions. From Science Frontiers #7 , June 1979 . 1979-2000 William R. Corliss ...
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