Across
- 1. A cluster of billions of stars held together by gravity
- 4. The natural force of attraction between any two massive bodies
- 5. objects composed of rock and metal that move around the sun
- 7. small frozen mass that moves around the sun
- 10. A natural satellite orbiting around a planet
- 11. The time it takes for a planet to rotate once around its axis
- 12. The time it takes for a planet to revolve once around its Sun
Down
- 2. The scientific study of outer space
- 3. rising and falling of oceans caused by the gravitational pull of the Moon and the Sun
- 6. Relating to the sun
- 8. The partial or total blocking of the view of one object in space by another
- 9. Relating to the moon