Across
- 1. – The force that pulls everything toward the ground (or toward the center of the planets).
- 3. – When the Moon or Sun are hidden for a period of time.
- 6. – What makes a rocket rise and fly.
- 8. – The layer of air surrounding the Earth.
- 9. – A group of planets orbiting the Sun.
Down
- 2. – A device used to observe stars up close.
- 4. – The act of discovering and exploring new places.
- 5. – A pattern formed by several stars in the sky.
- 7. – The path a planet takes around the Sun.