11.16 Habitable planet 2 Flashcards
1
Q
Up to what element do stars synthesize?
A
Up to iron.
Ejected during supernovae.
2
Q
How are the rest of elements made (after iron)?
A
From supernovae
3
Q
How are planets formed?
A
After debris created from supernovae.
Gravity causes collapse if gas and dust in a nebula.
Starts to rotate and gain momentum, attraction more mass.
4
Q
How do we know the composition of planets?
A
Meteorites.
Most meteorites are left over from planetary nebula.
5
Q
What is the hypothesis behind the creation of the moon?
A
Mars size object collides with Earth, material ejected forming moon.
