Across
- 2. Huge clouds of gas and dust in space.
- 6. It is the source of Earth's heat.
- 7. The smallest planet in the solar system.
- 10. Rocky bodies in space.
- 11. Energetic particles and electromagnetic waves that travel around space.
- 12. World beyond the Sun.
- 13. Large circular light source to Earth from space during the night.
- 14. Inescapable holes in space.
Down
- 1. Worlds that are a part of our solar system.
- 3. Clutter of stars that form an image in space.
- 4. Ghost particles in space.
- 5. Giant collections of stars in space.
- 6. Shines light into Earth's night, and appears to be tiny from our distance in Earth.
- 8. Cosmic snowballs of frozen gas in space.
- 9. Invisible forces that guide solar wind in space.