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Search results for: chondrule in all categories
11 results found.
1. Formation of Chondritic Meteorites and the Solar System [Journals] [SIS Review]
... also presented at the 13th National Australian Convention of Amateur Astronomers in Sydney during Easter 1988. It is the thunderbolt that steers the Universe' - Heraclitus, c.500 BC Introduction This paper examines some of the puzzling features of the largest class of meteorites, the stony chondritic meteorites, or chondrites. Chondrites are so named because they contain chondrules or small spherules of olivine, enstatite or another of the meteoritic materials. The chondrules are embedded in a matrix of similar material. A new theory of chondrite genesis is outlined here and an experiment proposed which may test its most important aspects. The implications of this theory for the formation of the Solar System is discussed, and also ...
2. The science of meteoritics: Stones of Heaven [Books]
... (b ) Aerolithes, which are non-metallic bodies, known as `stones', and containing only traces of metals. They have often the same general composition as terrestrial volcanic rocks, although their texture may differentiate them from the latter. Aerolithes are divided into: Chondrites, or stones containing spherical or irregular grain-like bodies of variable size (chondrules). Achmzdrites, or stones which do not contain chondrules. This makes their identification as meteorites far more difficult, as they are easily confused with terrestrial rocks. (c ) Siderolithes, or stones containing large metallic inclusions (mainly iron-nickel). Siderites and siderolithes are easily recognizable by their high magnetism and the characteristic pattern the metallic ...
3. News from the Internet [Journals] [SIS Workshop]
... discharges in protoplanetary systems http://arxiv.org/abs/astro-ph/0502010 Authors: B. McBreen, E. Winston, S. McBreen, L. Hanlon. Journal-ref: Astron.Astrophys. 429 (2005) L41. Lightning in the solar nebula is considered to be one of the probable sources for producing the chondrules that are found in meteorites. Gamma-ray bursts (GRBs) provide a large flux of gamma-rays that Compton scatter and create a charge separation in the gas because the electrons are displaced from the positive ions. The electric field easily exceeds the breakdown value of ~1 V m^ -1 over distances of order 0.1 AU. ...
4. Monitor [Journals] [SIS Workshop]
... main impact which generated a brilliant meteor, succeeded by a rising fireball of hot gases jetting out to 3,000 km above the planet's cloud tops. The main bright event was caused by flashes of infrared energy as the collapsing plume became compressed. Dark clouds formed later. ELECTROMAGNETISM Electricity in space In Lunar and Planetary Inst. Conference on chondrules and the protoplanetary disk, pp. 13-14 Primitive meteorites contain chondrules, tiny glassy drops which appear to be products of intense heating events. A leading candidate for the cause of these events is now suggested as electrostatic discharges. Our magnetic Sun New Scientist 29.7 .95, p. 14 and 17.6 .95, ...
5. Thoth Vol I, No. 19: July 16, 1997 [Journals] [Thoth]
... . I don't believe that. Rather, I think they are a snapshot taken during the more catastrophic phases of the recent development of the solar system. In 1987 I published a paper which examined some of the puzzling features of the largest class of meteorites, the stony chondritic meteorites, or chondrites. Chondrites are so named because they contain chondrules or small spherules of olivine, enstatite or another of the meteoritic materials. The chondrules are embedded in a matrix of similar material. Current theories of their formation see them as products of the condensation of the solar nebula, very early in the history of the Solar System. Their irregular form, different sizes and evidently complex history create ...
6. Thoth Vol III, No. 6: March 31, 1999 [Journals] [Thoth]
... is a great puzzle to astronomers since the weightlessness and vacuum of space is the ideal environment for liquids acting under surface tension to form perfect spheres. The droplets were frozen as they were being accelerated, either by electrical forces or by the gaseous blast of the cosmic "thunderclap". Strong evidence for the electrical model is found in the chondrules within such meteorites. They all show evidence of complex surface effects which I believe could be easily replicated in a plasma oven. (Refer to my CD for a much fuller explanation). It all points very strongly to a form of "lightning" having been responsible for some of the features found in meteorites. Several astronomers have ...
7. Monitor [Journals] [SIS Review]
... clumping together in a disc of dust and gas surrounding the young Sun is under fire. Instead, did the Sun violently spew out jets of charged particles from its poles? These would have had strong magnetic fields of their own, forming a wind' which blew material far and wide. This would explain the presence of melted blobs called chondrules in meteorites. They could not have been melted in the cold depths of space, whereas their strong magnetism suggests they solidified in powerful magnetic fields. Electric Spin (Science Frontier, no. 148, Jul. -Aug. 2003, p. 4) Metal spheres suspended on wires began to spin when a D.C . ...
8. Monitor [Journals] [SIS Workshop]
... 13 The hydrogen gas in our region of the Galaxy is apparently ionised, not so much by the 3 million stars near it, but by the influence of a single very distant star. Geologists have recognised the influence of giant bolts of lightning or magnetic flares' in the Solar System as they have shown that dark, fluffy inclusions in chondrules in meteorites were probably formed by intense electromagnetic discharges. Astrophysicists are now having trouble with their dynamo' theory which they dreamed up to explain the magnetic fields which all rotating bodies and systems in the Universe appear to have, from planets and stars to whole galaxies. Detailed examination shows that the theory just will not work for the Sun ...
9. Thoth Vol IV, No 9: May 31, 2000 [Journals] [Thoth]
... of spacecraft on arrival there). The rest formed meteors and a belt of asteroids. This model simply explains why many meteorites contain minerals whose crystals show that they must have formed inside a planet. It explains the origin of the Martian meteorites that are arriving on Earth. And the electric arc mechanism explains simply the strange flash heating of chondrules and other minerals in meteorites. So, if EROS' parent was Mars it may show similarities to Martian rocks. The most compelling evidence of their electrical birth is that all asteroids imaged to date bear scars in the diagnostic form of circular electric arc cratering. One large crater on asteroid Vesta has an untouched central peak. Impacts do ...
10. Thoth Vol II, No. 18: Nov 15, 1998 [Journals] [Thoth]
... replies: The bulk isotopic composition of the asteroid should match precisely some scarred area of its parent body, be it Mars or another planet or moon. A difficulty may arise from the fact that the composition of the asteroid will be judged from its exposed surface. Now, chondritic meteorites exhibit anomalous isotopic composition on the surface of the melted chondrules. As I have explained in detail on the CD, this is likely to be due to ion implantation etc. So I expect the same effect to be evident on larger bodies that were born in the same event as the meteorites. Without taking a cored sample from the asteroid (not in the NEAR program) we won't know ...
11. Thoth Vol I, No. 1: January 25, 1997 [Journals] [Thoth]
... planetary discharge event. They show all the characteristics to be expected of material that has been subjected to flash heating, acceleration, collision and ion implantation in a spatially restricted compressed gas stream together with isotopic modification by enhanced radiation, followed by sudden cooling - all the symptoms of a plasma discharge. I predicted that the features of the enigmatic chondrule shells could be reproduced in the lab in a plasma oven. (A planetary discharge is a very effective way for Martian meteorites to have been created). Very strong evidence for planetary electrical scarring comes from the Magellan Orbiter images of Venus. Also, the Jovian moon, Europa was presumably a part of the SC and would also ...
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