| A | B |
|---|
| asteroid | small, rocky object that orbits the Sun |
| comet | small, orbiting body made of dust, ice, and frozen gases |
| meteor | chunk of matter that enter's Earth's atmosphere |
| meteorite | chunk of a meteor that falls to the ground |
| planet | large body that revolves around the Sun |
| solar system | the Sun and all the bodies that revolve around it |
| moon | a natural satellite that orbits a planet |
| meteoroid | a meteor while it is still in space |
| gravity of Sun | force that holds all the objects in the solar system in their orbits |
| Milky Way Galaxy | a larger system that the solar system is part of |
| cloud of gases & dust | what scientists believe the solar system may have formed from |
| shooting stars | these are actually meteors in Earth's atmosphere |
| meteor showers | most of these occur when Earth passes through clouds of dust left by a passing comet |
| tail | part of a comet that always points away from the Sun |
| coma | glowing region of a comet |
| nucleus | center part of a comet made up of frozen gases |
| asteroid belt | most asteroids in the solar system orbit in this band |
