asteroid

a large rocky object that orbits the sun

astronomer

a person who studies the stars, planets, and everything beyond the Earth's atmosphere

black hole

an astronomical object with such extreme gravity that even light can't escape it

experimental

ex means "out" peri means "try"
To try something out, something new

galaxy

a large group of stars held together by gravity

mechanics

a branch of physics that deals with the actions of forces on objects

meteor

a mass of rock or metal that enters Earth's atmosphere from space

meteorite

the remains of a meteor that has fallen to earth w/o burning up