Across
- 2. celestial body consisting of a mass of hydrogen and helium gas held together by its own gravity, emits light
- 6. a large cloud of gas and dust where stars are born
- 7. a small rocky body that enters the earth's atmosphere
- 9. a collection of small and large bodies that orbit the Sun
Down
- 1. the remains of a star that exploded in a supernova
- 3. a small rocky body that orbits the sun
- 4. space and all of the energy and matter in it
- 5. a large collection of stars, gas, and dust, that is held together by gravity
- 8. a small icy body that orbits the sun with a "tail" of gas and dust particles