front 1 asteroid | back 1 a large rocky object that orbits the sun |
front 2 astronomer | back 2 a person who studies the stars, planets, and everything beyond the Earth's atmosphere |
front 3 black hole | back 3 an astronomical object with such extreme gravity that even light can't escape it |
front 4 experimental | back 4 ex means "out" peri means "try" |
front 5 galaxy | back 5 a large group of stars held together by gravity |
front 6 mechanics | back 6 a branch of physics that deals with the actions of forces on objects |
front 7 meteor | back 7 a mass of rock or metal that enters Earth's atmosphere from space |
front 8 meteorite | back 8 the remains of a meteor that has fallen to earth w/o burning up |