Astrophysics

3. The region between Mars and Jupiter where most rocky space debris is found.
5. A large, round object orbiting a star that has cleared its path of smaller debris.
6. A natural or artificial object that orbits a planet, like the Moon or a space station.
7. A small, rocky body that orbits the Sun, often called a minor planet.
9. A "dirty snowball" made of ice and dust that develops a long, bright tail when it gets close to the Sun.
10. A giant ball of hot, glowing gas that produces its own heat and light; the Sun is one.

1. Everything that exists: all matter, energy, planets, and galaxies.
2. Billions of stars, dust, and gas held together by gravity; ours is the Milky Way.
4. The Sun and all the planets, moons, and other objects that orbit it.
8. The curved path one object takes around a much larger one.