Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpico.526...56w&link_type=abstract
Press Abstracts from the Fifteenth Lunar and Planetary Science Conference, held March 12 -16, 1984, in Houston, TX. LPI Contribu
Astronomy and Astrophysics
Astrophysics
Chondrule, Contacts (Geology), Drag, Formations, Interplanetary Dust, Meteoroid Dust Clouds, Solar System, Astrophysics, Celestial Mechanics, Geophysics, Solar Corona
Scientific paper
The solar system which had a beginning, 4.6 billion years ago is discussed. The atoms that make up the solar system are much older than that, however: they were also part of the universe that existed before the solar system formed. The presence and location of the atoms of silicon, iron, calcium, that make up the Earth and other planets before there was a solar system is questioned. Astronomical it is shown that they existed in tiny dust grains which, along with molecules of gas, wandered about in the vast reaches of space between the stars of our galaxy. The solar system was formed when one particular cloud of interstellar dust and gas became dense enough to be gravitationally unstable: the gravitational pull that dust grains and gas molecules exerted on one another caused the cloud to collapse.
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