5 results found.
... 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 Quasar, quasar, burning bright; what shifts your spectral light?T. Heckman, of the University of Maryland, has ordained that the apostles of noncosmological redshifts must now recant. He and his colleagues believe that they now have the most convincing demonstration to date that quasar redshifts are of cosmological origin; that is, the larger the redshift, the faster the quasar is receding and the farther away it is. "Availing themselves of the extraordinary new imaging and spectroscopic capabilities of charge-coupled-device (CCD) detectors, they have measured the redshifts of 19 nebulous objects that appear to be companion galaxies of 15 relatively low-redshift quasars. Observing at the Kitt Peak 4-meter telescope, they have determined that, in 18 of these 19 cases, the apparent companion has a redshift very close to that of the quasar. While Burbidge, Arp and their partisans may argue that quasars are so peculiar that they can generate redshifts of unknown origin, this position becomes difficult to maintain for companion galaxies that otherwise look perfectly ordinary." H. Arp and G. Burbidge, chief among those ordered to recant, are not convinced. Arp points to many cases where bridges of luminous material connect high-redshift quasars with low redshift galaxies. Also, the clustering of quasars around nearby galaxies supports the nearness of quasars. As Burbidge has observed, if: ". .. just one large redshift is not due ...
Terms matched: 1 - Score: 15 - 15 May 2017 - URL: /sf038/sf038p04.htm
... weak physical contact until just prior to becoming visible. 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 ...
Terms matched: 1 - Score: 14 - 15 May 2017 - URL: /sf086/sf086a03.htm
... near-vacuum of outer space? Perhaps, thought Frank, they are protected by a thin coating of carbon. (Roylance, Frank D.; "Space Snowballs Theory Gains Credence," Baltimore Sun, May 29, 1997. Also: Monastersky, R.; "Is Earth Pelted by Space Snowballs?" Science News, 151:332, 1997. Thanks to all who sent in clippings. There are too many to mention here. Frank's photos also appeared on some national news programs.) Comments. We have already mentioned the minicomets several times in SF. See SF#60/275, for example. If verified, icy minicomets might well be the source of some of the earth's ocean water. Perhaps they are related to those strange "nebulous" meteors (SF#86/75) and noctilucent clouds. An intense 40day minicomet "storm" might be useful in accounting for certain historical floods!! From Science Frontiers #112, JUL-AUG 1997 . 1997-2000 William R. Corliss ...
Terms matched: 1 - Score: 14 - 15 May 2017 - URL: /sf112/sf112p11.htm
... Science Frontiers ONLINE No. 86: Mar-Apr 1993 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Cosmic Snowballs And Magnetic Asteroids The genesis of a cosmic "dust bunny". The nebulous meteor of July 29, 1970, as observed over Dover, England. The great diversity of the debris swirling around the solar system is making life difficult for scientists trying to reconstruct solar-system history. At the high end of the density spectrum, we now have an asteroid that seems to be mostly metal (probably iron). This is the asteroid Gaspra, some 13 kilometers across, that the Galileo spacecraft encountered in August 1992 on its way to Jupiter. Scientists had not expected Galileo's magnetometer to flicker as it passed Gaspra at a distance of 1600 kilometers -- but it did. In fact, considering the inverse square law and Gaspra's small size, it was a magnetic wallop. Thus, Gaspra is the first known magnetic asteroid; and it is probably mostly metal. (Kerr, Richard A.; "Magnetic Ripple Hints Gaspra Is Metallic," Science, 259: 176, 1993.) At the low end of the density spectrum, we now find that Pluto's moon, Charon, and some of Saturn's moons have very low densities (1 .2 -1 .4 ), meaning they are probably mostly water ice. Such density figures come from direct observation of these objects' volumes combined with mass estimates from their orbital dynamics. (Crosswell, Ken; " ...
Terms matched: 1 - Score: 13 - 15 May 2017 - URL: /sf086/sf086a04.htm
... Comets ACO7 Persistence of Long-Period Comets Despite Attrition from Molecular Clouds ACO8 Seriality of Cometary Apparitions ACO9 Multiple Tails and Antitails ACO10 Ejection of Spherical Halos ACO11 Correlation of Terrestrial Auroras and the Phenomena of Distant Comets ACO12 Blinking Comets ACO13 The Anomalous Disappearance of Comets ACO14 Anomalous Brightening of Short-Period Comets ACO15 Comet Reflectivities Are Similar to Those of Asteroids ACO16 Some Cometary Light Curves Resemble Those of Asteroids ACO17 New Comets Exhibit Different Brightening Behavior Than Old Comets ACO18 Anomalous Splitting of Comets ACO19 Tail-Wagging Comets ACO20 Cometary Outbursts ACO21 Comet Attrition Rates Imply Youth ACO22 No Ices in Cometary Reflection Spectra ACO23 The Blackness of Cometary Nuclei ACX OCCULTATIONS BY COMETS ACX1 Cometary Tails: Anomalous Occultations of Radio Stars AE ENIGMATIC OBJECTS AEO BRIGHT ENIGMATIC OBJECTS AEO1 Bright Objects near the Sun AEO2 Starlike Objects with Anomalous Motions AEO3 Unexplained Nebulous Objects AEX UNIDENTIFIED OBJECTS TRANSITING THE SUN, MOON, AND PLANETS AEX1 Objects Crossing the Face of the Sun AEX2 Objects Crossing the Moon's Disk AEX3 Unidentified Objects Transiting Jupiter AG THE EARTH AGB ANOMALIES IN THE EARTH'S ROTATION AGB1 Variations in Latitude AGL EARTH-SATELLITE PHENOMENA AGL1 Slow Changes in Satellite Inclination AGL2 Sudden Perturbations of Orbital Elements AGL3 Slow, Unexplained Descent of Satellites AGL4 Direct Visual Observations of Natural Earth Satellites AGL5 Radio Propagation and Natural Earth Satellites AGL6 Correlation of Geophysical Events with Perigee Passages of Natural Earth Satellites AGO OBSERVATIONS OF EARTH FROM SPACE AGO1 Periodic Changes in Earth's Brightness AH MERCURY AHB MERCURY'S ORBITAL AND SPIN ANOMALIES AHB1 The Residual Advance of Mercury's Perihelion AHB2 Mercury's High Eccentricity and Inclination AHB3 Short Transit Times across the Sun AHB4 Mercury ...
Terms matched: 1 - Score: 12 - 15 May 2017 - URL: /cat-astr.htm
