Astro quiz solar system
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10 Terms
nebulae
giant cloud of dust and gas, mostly made of hydrogen and helium
solar nebula
portion of nebula collapsed, forms solar system
why are terrestrial planets closer to the sun
high density, small and solid
time-line of planetary formation from planetesimals to planets
when material collide and stick together, condense based on temperature
How did planet formation affect the shape of orbit and the ecliptic
the plane of cloud cause formations
what is a comet
small solar system body, icy body dust and frozen gas
what is an asteroid
small solar system body, rocky and airless
how do we know how old the solar system is
because of the moon, period it takes to orbit and distance from the earth
planetesimals
up to 10km, collisions form protoplanets
protoplanets
nearly circular orbits to form young planets
Note 
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