Comet Beginnings and E

Comet Beginnings and E - Comet Beginnings and E nds A. A...

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Comet Beginnings and E nds A. A piece of a large cloud complex started to collapse about five billion years ago. The cloud complex had already been "polluted" with dust grains from previous generations of stars, so it was possible to form the rocky terrestrial planets. As the piece, called the solar nebula collapsed, its slight rotation increased. This is because of the conservation of angular momentum . B. Centrifugal effects caused the outer parts of the nebula to flatten into a disk, while the core of the solar nebula formed the Sun. The planets formed from material in the disk and the Sun was at the center of the disk. This explains items (a) and (b) of the observables above. Disks are seen around most of the young lower-mass stars in our Galaxy today, so we know that this part of the model is a common process in star formation. C. Most of the gas molecules and dust grains moved in circular orbits. Those on noncircular orbits collided with other particles, so eventually the noncircular motions were dampened
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Comet Beginnings and E - Comet Beginnings and E nds A. A...

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