Across
- 2. Large bodies orbiting stars
- 5. Invisible substance that makes up most of the universe
- 7. Icy objects that develop tails when near the Sun
- 8. Natural satellites orbiting planets
Down
- 1. Regions in space where gravity is so strong that not even light can escape
- 3. Huge systems of stars, dust, and gas
- 4. Bright balls of burning gas
- 6. Rocky bodies orbiting the Sun, mostly between Mars and Jupiter