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Search results for: comet in all categories

1158 results found.

116 pages of results.
181. Miscellaneous [Pensee]
... characteristics of a cometary atmosphere apply also to the plasma flow past Venus. Namely, ionization processes, in adding mass to the plasma flow, 1) cause interaction over an extended region, with a gradual change in flow parameters, and 2) eliminate, or at least weaken, the leading bow shock. While the significance of this conclusion for Velikovsky's own contentions about Venus is not immediately clear, Wallis' paper does underscore the weakness of that argument, often advanced against Velikovsky, which is based on the definition of a comet. (See also the paper by C.J. Ransom and L.H. Hoffee in this issue.) In claiming that Venus was once a "comet" --he actually prefers the term "protoplanet"--Velikovsky never asserted that Venus was identical in nature with comets observed today. There is no force at all in the claim that, since comets are relatively insubstantial, Venus, which has 4/5 the mass of the Earth, could not have been a comet. Venus' birth from Jupiter certainly had unique aspects, and ...
Terms matched: 1  -  Score: 60  -  05 Mar 2003  -  5k  -  URL:
182. A Curious String Of Coincidences [Science Frontiers Website]
... Science Frontiers ONLINE No. 96: Nov-Dec 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects A Curious String Of Coincidences The journal Nature is not the place where one usually finds mention of bizarre coincidences. Nature's nature is supposed to be exclusively rational-- completely dedicated to a cause-and-effect universe. Yet, there it was: A letter from A. Scott calling attention to the fact that three fragments of the comet Shoemaker-Levy 9 impacted Jupiter almost precisely 25 years after three crucial events in the Apollo-11 moon landing mission. Fact #1. Comet fragment 1 impacted the same day as the Apollo-11 launch, but 25 years later. Fact #2. The largest comet fragment hit Jupiter 25 years to the minute after the actual landing. Fact #3. The final comet fragment hit almost precisely 25 years after lift-off from the lunar surface. "So the start, climax and end of the series of impacts coincided exactly with the start, climax and end (in the sense of departure from the Moon) ...
Terms matched: 1  -  Score: 60  -  29 Apr 2005  -  5k  -  URL:
183. ABOB's Page: Comets, Culture, & Currency [SIS Internet Digest $]
... From: SIS Internet Digest 1996:2 (Feb 1997) Home¦ Issue Contents ABOB's Page: Comets, Culture,& Currency This is the Web page of SIS author, Bob Kobres (see Workshop 1991:2), which he describes as reflecting "over a decade of research aimed at understanding the social and physical influence of a large comet in an Earth threatening orbit which, according to astronomical evidence, has been progressively breaking up since the Holocene time period began". Articles include: "Comet Phaethon's Ride", a condensed version of which, titled, "The Path of a Comet and Phaethon's Ride", was published by The World& I (ISSN 0887-9346) Vol. 10, No. 2 (Feb. 95). "A Re-evaluation of the Extraterrestrial Origin of the Carolina Bays" by J. Ronald Eyton &; Judith I Parkhurst (Paper Number 9, April 1975, Geography Graduate Student Association University of Illinois at Urbana Champaign), which discusses that "Meteoritic ...
Terms matched: 1  -  Score: 60  -  05 Mar 2003  -  1k  -  URL:
184. Halley: A Young, Combusting, Alien Interloper [Science Frontiers Website]
... Science Frontiers ONLINE No. 64: Jul-Aug 1989 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Halley: a young, combusting, alien interloper Can this be the comet Halley of the textbooks? Comets are supposed to be as old as the solar system itself (4.6 billion years), born of solar-system stuff when a gaseous cloud condensed. Above all, comets do not "burn" or combust! The vision of a "burning" comet was advanced by recent observations that the velocity and temperature of the gases escaping from Halley are higher than one would expect from the sublimation of ices under solar radiation. Also, the concentration of expelled material in large, hypersonic jets carrying large quantities of fine dust further undermine the sublimation model. E.M. Drobyshevski has concluded "The new observations, together with some earlier data still poorly understood (e.g., the appearance in the coma of large amounts of C 3) can be accounted for by assuming the cometary ices to contain, apart from the hydrocarbons, ...
Terms matched: 1  -  Score: 60  -  29 Apr 2005  -  7k  -  URL:
185. International Workshop Tunguska96 [SIS Internet Digest $]
... surviving Tunguska trees. V. D. Nesvetajlo (Tomsk Univ.) Consequences of the Tunguska catastrophe: dendrochronologic inferences. E. M. Kolesnikov (Moscow Univ.) Chemical and isotopic investigation of peat and spherules from the Tunguska region. R. Rocchia (CFR, CEA/CNRS, Gif-sur-Yvette, France) Search for Iridium and extraterrestrial particles in polar snow and on the Tunguska site. G. V. Andreev (Tomsk Univ.) Tunguska eyewitness recollections of local effects and of worldwide atmospheric effects. Session 2: Comet or asteroid? A comparison between recent American and Russian mathematical models for the Tunguska explosion. Invited talks: Z. Sekanina (Jet Propulsion Laboratory, Pasadena) Evidence for an asteroidal origin of the Tunguska body. S. S. Grigorian (Russian Academy of Sciences) The cometary nature of the Tunguska meteorite. On the predictive possibilities of models for impacts. J. G. Hills (Los Alamos National Laboratory) Damage from small asteroid and comet impacts. V. P. Korobeinikov (ICAD, Russian Academy of Sciences ...
Terms matched: 1  -  Score: 60  -  05 Mar 2003  -  4k  -  URL:
186. Velikovsky: Hero or Heretic? [SIS C&C Review $]
... his arguments are convincing to a large number of people. This last may be the reason why scientists, and especially astronomers, were so outraged by his theories; they were offended by the public's willingness to accept Dr Velikovsky's authority on the same footing as their own. My own feeling is that it never hurts an expert to have an outsider come along and point out that he may have missed a thing or two. What did the astronomers miss, according to Velikovsky? The essential idea in Dr Velikovsky's theory is that a comet or planet collided repeatedly with the earth in the fifteenth century BC and initiated another series of collisions in the eighth century BC, altering the course of history and causing legends of ancient peoples. Many details are grafted onto this basic element in the theory. The colliding planet was Venus; it came out of Jupiter; it was the source of the manna that nourished the Israelites, the vermin that plagued the Egyptians [4 and the drops of blood in the Nile; and when Venus collided with the Earth it may have ...
Terms matched: 1  -  Score: 60  -  05 Mar 2003  -  16k  -  URL:
... . If there was a catastrophe at the time of the Exodus (and David Salkeld argues very persuasively that there was) it would have been quite a minor one, maybe fairly localised in its effects. But, as Bimson argues, there is no necessity to postulate a second, Conquest, catastrophe event. 3. There is no agreement on what class of event brought about the end of Early Bronze Age. On the one hand there is the astronomically acceptable thesis of Clube& Napier- the disintegration of a rather large comet, with periodic interaction between Earth and the comet/asteroid stream resulting in catastrophe events. However, as I indicate, this sits uncomfortably with ancient testimony that the agent of destruction was the Venus goddess, who was astral and yet terrestrial, and who represented both a planet and a comet. On the other hand, there is the Velikovsky thesis (still dismissed as 'wildly impossible' on the grounds of celestial dynamics) that within historical times Venus was a gigantic comet: but his conclusion, that Venus is a youthful ...
Terms matched: 1  -  Score: 60  -  05 Mar 2003  -  12k  -  URL:
188. COMETS, ASTEROIDS, OR NEITHER? [Science Frontiers Website]
... Science Frontiers ONLINE No. 95: Sep-Oct 1994 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Comets, asteroids, or neither? Like supernova 1987A, also mentioned in this issue, comet P/Shoemaker-Levi-9 is generating headlines in the scientific and popular media. Everyone expected that the impact of this comet on Jupiter would provide us with some very interesting phenomena, but most thought that the debris kicked up by the impacts would reveal something new about Jupiter-- not about comets, since everyone knows what they are! Instead, the long-held theory that comets are simply dirty iceballs is now questioned. Shoemaker-Levi-9 was originally classified as a comet because: (1) Its fragments all appeared to be surrounded by comas like all well-behaved comets; and (2) It was easily torn apart by Jupiter's strong gravitational field as it narrowly missed Jupiter in 1992. This is just what one would expect from a loosely compacted dirty iceball. But doubts about Shoemaker-Levi-9's true nature have arisen because of two observations: (1) ...
Terms matched: 1  -  Score: 60  -  29 Apr 2005  -  5k  -  URL:
... had to be revised because of the catastrophe. 8. Many species were extinguished catastrophically. 9. Religion was born in cometary worship and tied to phallic forms because of the shape of comets. 10. Fear of cometary collisions is inherited by mankind. 11. Vermin were deposited by comets which also provoked plagues. 12. Deities from Egypt, Greece, Meso-America, and elsewhere were identified with planets. 13. Pyramids were both astronomical observatories and 'air-raid shelters' for nobility and kings. 14. Planet Saturn, as a comet, caused the Noachian Deluge. 15. The Atlantis date (c. 9500 BC) given by Plato had to be shortened. 16. Extensive legendary evidence pictures the 'hairy', 'bearded', 'blazing stars' that were comets. 17. Stonehenge, Avebury Circle and similar monuments were astronomical instruments. 18. Central American legends (and cultures) were contemporaneous with those of the Old World. 19. The intercalary 'five evil days' were cursed because they coincided with a world disaster and the ending of an age ...
Terms matched: 1  -  Score: 60  -  05 Mar 2003  -  11k  -  URL:
190. Focus [SIS C&C Workshop $]
... and of course, Sagan is supposed to be an expert at astronomy) but as an example of how wrong Velikovsky is, Gribbin selects the total weight of manna required to feed the children of Israel 40 years in the wilderness. Immediately we are provided with a piece of disinformation in Sagan's claim that the manna fall lasted for 2000 years according to Velikovsky. But assuming that a layer one inch thick fell over the entire earth every day for 40 years, a body whose mass exceeded that of Jupiter (out of which the comet was supposed to have been formed) would have been required. Poor Gribbin- taken in by the Sagan method! First he concentrates on the field in which he is not an expert, then he provides some disinformation, then he makes some dubious assumptions, then he presents the calculations (Sagan is no expert at calculations, as his past record proves) in a way designed to make the result look ridiculous. Even Sagan's result isn't quite so silly as it looks- who is to say what the mass of Jupiter ...
Terms matched: 1  -  Score: 60  -  05 Mar 2003  -  8k  -  URL:
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