Across
- 3. — Planet known for its rings
- 5. Region where gravity is so strong light can't escape
- 6. Way — The galaxy that contains Earth
- 7. Small, rocky bodies orbiting the sun
- 10. — Large cloud of gas and dust in space
- 11. A galaxy shape similar to a spinning disk
- 13. The study of stars, planets, and space
- 15. The layer of gas surrounding a planet
- 17. — Frozen balls of dust and ice with glowing tails
- 18. The closest galaxy to the Milky Way
Down
- 1. — Force that pulls objects toward each other
- 2. — Our nearest star
- 4. — A star that suddenly increases in brightness
- 6. — Small natural object orbiting a planet
- 8. Giant explosion marking the end of a massive star
- 9. — The Red Planet
- 12. Robotic spacecraft sent to explore space
- 14. The path one object takes around another
- 16. Velocity The speed needed to break free of a planet’s pull
- 19. The first planet from the sun