Across
- 2. A celestial body that revolves around a planet.
- 5. Any of the large celestial bodies that revolve around the Sun in the solar system.
- 7. All space and the matter space contains.
- 8. A ball of gas in space that produces its own light and heat.
Down
- 1. The luminous star around which Earth and other planets revolve; composed mainly of hydrogen and helium.
- 3. Curved path followed by a satellite as it revolves around an object.
- 4. A large grouping of stars in space.
- 6. A large cloud of dust and gas in space.
- 8. system The Sun together with the group of planets and other celestial bodies that are held by its gravitational attraction and revolve around it.