Across
- 1. Force allowing moons to orbit planets
- 4. Tiny Saturn moon erupting water vapor
- 6. Moon giving Saturn's "Death Star" look
- 8. Bands of material around some planets
- 9. When moons pass into planet's shadow
- 10. Moons vary in how far from planets
Down
- 2. Some moons are made mostly of this material
- 3. Active on the moon Io
- 5. Jupiter's largest moon
- 7. Planet with the brightest ring system