Across
- 2. The star planets orbit around.
- 4. A massive cloud of dust and gas that exists between stars and serves as a cradle for new stars.
- 7. The explosion of a star.
- 9. A luminous body in space, visable during the night sky.
- 10. gasses surrounding a planet
- 12. Icy left overs of the solar system, made by dust, rocks, and ices.
- 14. The distance from the center of the earth towards the center of the sun.
- 16. A large spiral of stars, dust, and gasses in space.
- 18. A meteor that can reach the Earth without becoming vaporized.
- 19. Small rock orbiting the sun.
- 20. Artificially body orbiting the Earth.
Down
- 1. the assumption on how the universe began.
- 3. The collection of celestial bodies held around the sun in our universe.
- 5. The process of orbiting.
- 6. A group of stars in a specific pattern.
- 8. The distance that light travels in a year.
- 11. Billions of stars and their solar systems.
- 13. A natural satellite that orbits the earth.
- 15. The collection of all of space as a whole.
- 17. Appearing as a streak of light, a small and rocky body in outer space.