Across
- 4. a rock that’s icy and lets off dust and gas as it flies through space
- 5. gases around the Earth and other planets that are held there by gravity
- 10. planet that rolls rather than spins
- 11. solar system
- 12. group of stars in the sky that form specific patterns from where you see them
- 13. the force that pulls what everything is made of together
- 14. description of objects with a million or more times mass than our sun
Down
- 1. a medieval tool or instrument used to measure a star’s altitude
- 2. a building made for looking at a large area surrounding you
- 3. planet that is similar in size to Earth
- 6. an object that’s natural and moves around a bigger object that’s
- 7. freely floating planet that goes between stars or orbits a star outside
- 8. things that exist on planets other than Earth
- 9. . Italian astronomer and physicist, as well as a mathematician and a