Beyond our planet

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