Across
- 3. Neptune’s largest moon, known for its retrograde orbit
- 5. A region where a star’s gravity prevents light from escaping
- 6. Name for a day on Mercury, which lasts longer than its year
- 7. The icy region beyond Neptune filled with small bodies
- 10. The belt of rocky debris between Mars and Jupiter
Down
- 1. The boundary where the Sun's influence ends
- 2. Home to the deepest canyon, Valles Marineris
- 4. Planet with the fastest orbit around the Sun
- 8. The only planet that rotates on its side
- 9. Gas giant with a Great Red Spot