Across
- 2. dark flat areas on the moon's surface
- 3. the blocking of an object in space by another
- 6. a chunk of rocks or dust in space
- 7. the attractive force between objects
Down
- 1. a large pit caused by a meteoroid
- 2. a streak of light caused by a meteorite
- 4. a system of organizing time
- 5. a collection of ice and dust that goes around the sun