Across
- 3. large and heavy or solid
- 4. marking the longest and shortest days
- 8. an example would be The Big Dipper
- 9. all stars, planets, and solar systems are formed from these
- 10. remote-controlled mechanical arm
- 11. small,airless rocky worlds that revolve around the sun and are too small to be called planets.
- 12. natural phenomenon by which all physical bodies attract each other.
Down
- 1. Global Positioning System
- 2. unit of length used informally to express astronomical distances
- 4. stellar explosion that briefly outshines an entire galaxy
- 5. its held together by its own gravity
- 6. a meteorite when hits the Earths surface
- 7. one way to create this environment is to travel away from Earth.
- 10. icy small Solar System body