Across
- 1. A planet made of rocks
- 4. A collection of planets and other space rocks around a star
- 6. A singular clump of material that goes around a star
Down
- 2. The blanket of air over a planet
- 3. The time it takes a planet to spin around
- 4. The name of the star in our solar-system
- 5. The time it takes a planet to go around the sun