Across
- 3. different "shapes" of the moon throughout the month (2 words)
- 5. the last name of the guy who "discovered" gravity
- 6. invented by Galileo and used to see objects far away
- 8. an expert who studies space and the physical universe
- 11. a group of stars that form a shape in the night sky
- 13. a planet spinning once around its own axis (one day)
Down
- 1. planets that are outside of our own solar system
- 2. the force that attracts a body towards the center of Earth
- 4. the movement of Earth around the sun (one year)
- 7. the path of a planet around the sun, or a moon around a planet
- 9. this uses shadows to tell the time
- 10. Earth's natural satellite that shines by reflecting the Sun's light
- 12. an invisible line that a planet spins around