23 results found containing all search terms. 413 results found containing some search terms.
... Science Frontiers ONLINE No. 1: September 1977 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Four Extragalactic Sources Expand Faster Than Light Three quasars and one galaxy possess structures that apparently expand faster than light. The sizes of the three qua sars were measured over periods of time by Very Long Baseline Interferometers (VLBIs). In the case of quasar 3C279, the apparent velocity of expansion was ten times that of light. The quasars all have rather large redshifts, indicating great distances from earth, but the lone galaxy displaying "superluminal" expansion has a redshift of only 0.032. This fact suggests that superluminal velocities cannot be employed as arguments against redshifts being cosmological; that is, measures of distances from earth. Therefore, if the redshift is truly a measure of distance (as it seems to be), some astronomical structures (perhaps not matter itself) seem to grow faster than the velocity of light. (Cohen, M.H ., et al; "Radio Sources with Superluminal Velocities," Nature, 268:405, 1977.) From Science Frontiers #1 , September 1977 . 1977-2000 William R. Corliss ...
Terms matched: 1 - Score: 109 - 15 May 2017 - URL: /sf001/sf001p04.htm
... 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 Light Flashes Overhead January 23, 1984. Salonta, Romania. "During the whole day we experienced snow which finally stopped at 23h 00m. The temperature was l C, when I experienced a few pale flashings from the top of the sky. The lights were seen from 18h 15m to l8h 30m, Universal Time. Their number was four, and they appeared with equal intensity with pauses in between, each pause lasting for 3-5 minutes. All were white in color. At l8h 3lm, a new flashing was seen; this was the fifth flash in the series, and it had higher intensity than the previous ones. I have not been able to discover the source of these strange lights. Each flashing was very short-lived, lasting less than a second." The observer in Salonta was Attila KosaKiss. (Hedervari, Peter; "Further Observations of Atmospheric Light Phenomena of Unknown Origin," personal communication, February 15, 1984.) From Science Frontiers #33, MAY-JUN 1984 . 1984-2000 William R. Corliss ...
Terms matched: 1 - Score: 106 - 15 May 2017 - URL: /sf033/sf033p18.htm
... Science Frontiers ONLINE No. 80: Mar-Apr 1992 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Unidentified Light Strange optical phenomenon seen off the coast of Trinidad in 1991. January 13, 1991. Caribbean Sea. Aboard the m.v . Trinidad and Tobago . "At 0210 UTC whilst the ship was proceeding eastwards along the north coast of Trinidad, a relatively bright patch was noticed in the almost cloudless sky and was thought to be a cluster of stars. Its bearing was approximately 300 at an elevation of about 50 , and closer inspection through binoculars revealed a rather strange phenomenon, as shown in the sketch. "The bright patch was a perfect circle of a bright, light-blue colour and was transparent as stars could be seen through it. There was also a trail from the circle which looked like the track a disc would describe if it moved through an arc. This trail was also of light-blue colouration but was not nearly so bright as the circle. The entire phenomenon dissipated after about five minutes." (Knight, M.; "Unidentified Light," Marine Observer, 62:22, 1992.) From Science Frontiers #80, MAR-APR 1992 . 1992-2000 William R. Corliss ...
Terms matched: 1 - Score: 93 - 15 May 2017 - URL: /sf080/sf080g18.htm
... Science Frontiers ONLINE No. 38: Mar-Apr 1985 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects GREEN CLOUD WITH LIGHT RAYS "An account of a mysterious 'green cloud' sending out powerful shafts of light and flying in tandem with an airliner appeared in a Soviet newspaper today. The strange cloud was seen over Byelorussia by passengers and crew of a flight from Georgia to Tallinn, and by the crew of an airliner from Leningrad, passing 10 miles away according to Trud. Nikolai Zheltukhin, a corresponding member of the Academy of Sciences, said the object was certainly very big. He rejected the idea that the green cloud was an image caused by far-off atmospheric changes because the airman had fixed its location from the shafts of light it sent to the ground." (Anonymous; "Mysterious 'Green Cloud' Appears near Airliner," Baltimore Sun, January 31, 1985, p. 4A.) From Science Frontiers #38, MAR-APR 1985 . 1985-2000 William R. Corliss ...
Terms matched: 1 - Score: 89 - 15 May 2017 - URL: /sf038/sf038p15.htm
... Science Frontiers ONLINE No. 130: JUL-AUG 2000 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects The Saguenay Earthquake Lights November 1988-January 1989. Saguenay region of Quebec. During this period, a total of 67 quakes were recorded. The foreshock (November 23) registered 4.8 ; the main shock (November 25), 6.5 mmlg. Many after-shocks followed. During this spate of tremors, 38 unusual luminosities were initially reported from the region, 8 of them before the foreshock, being in effect earthquake precursors. Afterwards, residents were queried for details and additional observations. A total of 46 reports sufficiently detailed for analysis were obtained. These luminous phenomena were classified according to a scheme proposed by F. Montandon in 1948. Montandon's five categories are: Seismic lightning (no thunder); Luminous bands in atmosphere; Globular incandescent masses; Fire tongues, small mobile flames near the ground, like will-o '- the wisps; and Flames emerging from the ground. The globular incandescent masses were by far the most common type of earthquake light during this Canadian "flap." Of these, F. St-Laurent writes: There were twenty-two reports coming from different places. Often they were seen far from the epicenter or when the seismic activity was low or quiet. Some were stationary (in one case, the yellow and orange mass presented a horizontal elongated form), others were seen emerging from the ground, some were very fast-moving near the ...
Terms matched: 1 - Score: 88 - 15 May 2017 - URL: /sf130/sf130p10.htm
... Science Frontiers ONLINE No. 23: Sep-Oct 1982 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Remarkable Engineering Design In Nature Two unusual examples of inspired design in nature have been described recently: (1 ) The swordfish possesses special tissues rich in mitochrondria and cytochrome-c that generate heat for the animal's eye and brain. Not only do these heating elements keep the swordfish eye and brain significantly warmer than the surrounding water but they also keep these organs warm and thus more effective during deep dives into the cold ocean depths. (Carey, Francis G.; "A Brain Heater in the Swordfish," Science, 216:1327, 1982.) (2 ) Plants, it seems, developed light pipes long before humans. Certain plant tissues (etiolated or dark-grown) act as multiple bundles of optical fibers and coherently transfer light over distances of at least 2 cm. Optical tests show that these natural light pipes are much more effective transmitters of light than media that simply scatter light. This unsuspected sophistication of Nature's design may require significant revisions in photobiology, which did not allow for such ingenuity. (Smith , Harry; "Light-Piping by Plant Tissues," Nature, 298:423, 1982.) Comment. Since some plants are known to emit light, we would not be surprised, the way things are going, to learn of natural plant lasers! From Science Frontiers #23, SEP-OCT 1982 . 1982-2000 William R. Corliss ...
Terms matched: 1 - Score: 87 - 15 May 2017 - URL: /sf023/sf023p07.htm
... Science Frontiers ONLINE No. 116: Mar-Apr 1998 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Eyeless Vision Tomatoes see red. And other colors, too! We touched on this subject over a decade ago. (SF#54) Then we described how the use of red plastic mulch greatly improves the yields of tomato plants. More recent research reveals that fruit quality and resistance to pests are also improved. How can this be? Plant leaves, it turns out, contain color sensors -- light-sensitive pigments similar to those it the human retina. Obviously, the plants do not "see," but the pigments provide environmental information. Here's the mechanism: plant leaves reflect infrared light well, so when a tomato plant's pigments detect a lot of infrared, the plant "thinks" that it may be crowded out by competing vegetation. The tomato plant responds aggressively by growing more rapidly. The red plastic mulch between the rows also reflects a lot of infrared light, and it thereby tricks the tomato plant into accelerating its growth. (Raloff, Janet; "When Tomatoes See Red," Science News, 152:376, 1997.) Fire-detecting beetles. The beetle Melanophila acuminata seeks out forests that have just been ravaged by fires so that it can lay its eggs in the nutritious, freshly burnt wood. These insects are capable of detecting fires up to 32 kilometers (20 miles) distant. They do not see the fire with their eyes but instead detect the ...
Terms matched: 1 - Score: 80 - 15 May 2017 - URL: /sf116/sf116p07.htm
... Science Frontiers ONLINE No. 26: Mar-Apr 1983 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Slithering Patch Of Light September 8, 1981. Te Ngaere, New Zealand. Inside a house during a thunderstorm. "The next lightning seemed directly overhead and very bright and was accompanied by a simultaneous very loud clap of thunder. I looked up as the whole house shook and then looked down and saw a flow of light come in under the door. It settled in a blob near the edge of the area where the tools were laid out. It was not in any true shape but about 3 or 4 inches long and 2 inches wide, moving along the floor, less than half an inch thick, seemingly fluid in shape and texture. It reminded me of quicksilver, being a bluish-silver colour and it had rounded sides like a blob of mercury. It was brighter at the edges than in the middle, but it did not seem, especially in the light of the room, to glow, nor did it give out sparks. From the central body arms flowed out like runs of oil among the tools. The trails weaved through the tools -- not actually over them but round them -- moving back into the main body of the blob and then going out doing the same kind of movement over again. There was no sound or smell. The arms finally all went back into the blob which disappeared again suddenly out under the door. There was no bang and when I ventured to touch ...
Terms matched: 1 - Score: 79 - 15 May 2017 - URL: /sf026/sf026p10.htm
... 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 Unidentified Light January 14, 1993. Eastern North Pacific. Aboard the m.v . B.P . Adventure , Panama to Chiba. "At 0235 UTC the phenomenon shown in the sketch was first seen about 15 above the horizon, bearing 265 . It was initially thought to be a downward pointing spotlight from an aircraft: it was bright (nearly white), conical in shape and about 1 high. During further observation the shape slowly enlarged, becoming more bell-shaped with a darker elliptical patch at the bottom. As it increased in size, the shape faded away and moved slowly towards the horizon in a slightly southerly direction before disappearing just above the horizon at 0254, bearing 260 . "The maximum height reached by the shape was about 5 and throughout the observation stars could be seen through it while at one point it was nearly obscured by cloud of which there was 1 okta. The only other bright object nearby was Venus, being slightly higher and to the south, bearing 248 , elevation about 20 . Visibility was excellent as about 10 minutes after the observation a ship was spotted bearing 280 at a distance of 16 n.mile. The observers felt that the shape was too regular to be a cloud and had no real idea of its origins." (Peacock, K.E .; "Unidentified Light," Marine Observer, 64:17, 1994.) From Science Frontiers # ...
Terms matched: 1 - Score: 78 - 15 May 2017 - URL: /sf092/sf092g10.htm
... Science Frontiers ONLINE No. 109: Jan-Feb 1997 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Lunar Landslide Lights Moonwatchers have reported light flashes, strange red glows, and mist-like patches emanating from certain lunar locales, particularly the huge craters Alphonso and Picard. Hundreds of such observations have accumulated since the Middle Ages. Modern more-systematic scrutiny indeed confirms that the moon is not such a dead place after all. (See ALF in The Moon and the Planets for much more on this fascinating subject.) Moonquakes, gaseous emissions, and even volcanic activity have been the favorite explanations of these TLPs (Transient Lunar Phenomena), but these are only surmises. The many close-up photos of the lunar surface taken in 1994 by the lunar satellite Clementine gave B. Buratti, K. Herkenhoff, and T. McConnochie the opportunity to search for geological common denominators connecting the sites where TLPs have been most frequent. The suspicious sites are characterized by bluish spectra that usually indicate unusually fresh deposits of lunar debris. Furthermore, these areas are usually found along the inside edges of large craters. Buratti et al opine that these are the sites of recent landslides that have cascaded off the crater edges. The dust and volatile gases released by these events might account for the observed luminous phenomena. (Cowen, Ron; "Explaining a Lunar Mystery," Science News, 150:314, 1996.) Reference. To order the book The Moon and the Planets (mentioned above), visit here . The lunar ...
Terms matched: 1 - Score: 75 - 15 May 2017 - URL: /sf109/sf109p03.htm
