2.
The study of Constellations
3.
Someone who goes to space to study
7.
Looks like a small spoon
8.
Sun is excactly above the equator
9.
the longest or shortest day of the year
10.
A rock that enters the Earths atmosphere
11.
A rock that reached the surface of a planet
12.
A rock in the solar system
13.
Something stuck moving around another thing
14.
Orbits a star and is in a sphere
16.
Something that has planets stuck in it
18.
Looks like a small bear