Comet born of our own Sun
Solar material in comet dust brings confusion about Solar System modelling.
When scientists first analysed comet dust collected by the Stardust spacecraft earlier this year, they were surprised that the grains seemed to have all originated in very hot environments - the heart of a star (see 'Comet chasers get mineral shock'). Astronomers were confused at the idea that the star in question could be our own Sun. How was this material transported from the hot interior of our early Solar System to the cold, outer reaches where the comet actually coalesced? Their models of the Solar System, they feared, might have to be rethought.
Read the story here.
Comments
I think the comet Wild 2 don't orbit the sun as far as Pluto, its aphelion is a bout 3.44 AU (NASA fact sheets), but there are others orbit the sun as far as Pluto. Any way, the results of these researches as stated in this news, may indicate, in any solar disk, even if there were no any signs of planets, there should be comets orbiting its sun, as they are, may be, the primary outputs of the system formation.
Posted by: Hossam Aboulfotouh | December 15, 2006 05:20 PM
I don't know that much about astrophysics, but could it be that the comet
was born when a small chunk of matter from the outer regions passed
through the forming sun and got away with solar matter?
Posted by: Marc Andre Belanger | December 18, 2006 01:55 PM
Another thought is that could it be possible that even with extremely weak gravitational attraction couldn't a comet be slightly acretionary as it orbits the sun?
Posted by: Patrad Fischroy | December 18, 2006 05:53 PM
The only reason this discovery about Wild-2 is shocking is that it flies in the face of the conventional "Wisdom" that our sun/planets formed from a disk, of its own volition, rather than having been neucleated by material from another source having the properties needed to cause the accretion. The explanation of thisis part of a series of papers I hope to publish within the next year.
Posted by: Raymond A. Pohl | December 19, 2006 06:57 PM
The latest data on comets confirm their birth in the supernova explosion that made the solar system and blasted comets on their current trajectories [Nature 277, 615-620 (1979); 29th Lunar & Planetary Science Conf., Abst. 1974 (1998)].
Links to these papers are below:
1. Nature 277, 615-620 (1979); http://www.nature.com/nature/journal/v277/n5698/abs/277615a0.html
2. 29th Lunar & Planetary Science Conf., Abstract 1974 (1998); http://www.lpi.usra.edu/meetings/LPSC98/pdf/1974.pdf
With kind regards
Oliver K. Manuel
omatumr@yahoo.com
Posted by: Oliver K. Manuel | December 20, 2006 04:54 AM
Stars are not born by accretion; to the contrary, the spinning central bodies – from galaxies to planets – are generally the very cause of the disks around them which they tend to replenish and maintain. The breakthrough findings here (reported in 7 articles in Science last week) give that rock-solid proof. For the full picture, do visit The Sun (http://www.shedali.co.uk/ses/TheSun.htm) and other pages linked therein. (And do challenge this final model to the satisfaction of any university physics department head, alone, and collect US$25,000, which will be paid to the head beforehand! No joke; no scam; details in www.sittampalam.net.) Cheers!
Posted by: Eugene Sittampalam | December 20, 2006 01:38 PM
God resides in the spiritual realm....he opened his eyes and the physical was created...we meres call it the big bang...soon he will close his eyes and all this will compress back to the spiritual.One day in the life of the lord ...you know,- the Real reality. Look out!.. he's getting tired...
Posted by: lazlo | January 2, 2007 11:41 AM
The results of careful measurements of stable isotopes in planets, meteorites, the solar wind and solar flares since 1960 support Eugene Sittampalam's conclusion that "the spinning central bodies – from galaxies to planets – are generally the very cause of the disks around them". The Sun ejected all of the material now in the planetary disk [comets, planets, moons, meteorites and asteroids] when it exploded as a supernova five billion years ago. See "Isotopes Tell Origin and Operation of the Sun" http://arxiv.org/pdf/astro-ph/0510001
Posted by: Oliver K. Manuel | March 16, 2007 07:35 AM