Earth Sciences 1086F/G Lecture Notes - Lecture 4: Charge-Coupled Device, Earth Mass, Aten Asteroid
15 Dec 2016
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They are primordial objects left over from ss formation. Last remains of a planetismals that build the planets 4. 57 billion years ago. Spread out o(cid:448)er large (cid:448)olu(cid:373)e so (cid:271)ig (cid:272)ould(cid:374)"t see o(cid:374)e fro(cid:373) a(cid:374)other. Collisions occur bc variations in their circular orbits happen from jupiter. Collision can fragment asteroids or glue them together if at low speed. Current asteroid belt looks a lot different from before. Likely that all the larger asteroids have been found. Potentially hazardous asteroids: asteroids not in the belt that can be dangerous. End of 18th century some astronomers organized to search sky for "missing planet" predicted 2. 8. 1891 they took successive pics to look for streaks of asteroids moving across field of view. Only identified, numbered, named a few thousands even though knew there were more. March 1998 the lincoln near earth asteroid research (linear) telescope made in new mexico.
