Across
- 2. a giant space neighborhood made of stars, planets, and dust all held together by gravity
- 4. A theory that the earth started from a tiny dense point and expanded.
- 5. the force by which a planet or body draws object to its center
- 7. The model where Earth is considered the center of the universe.
Down
- 1. The model where the sun is considered the center of the universe.
- 3. like a big family in space where the sun is the parent, and all the planets & moons orbit around it
- 6. all space, matter, time, and energy