Across
- 3. The distance light travels in a year
- 5. Person who studies stars, planets, galaxies
- 7. How long it takes for Earth to rotate on its axis
- 8. An illustration that shows how something works
- 9. The planet we live on
Down
- 1. The shape of Earth
- 2. system The sun, moon, and planets that orbit the sun.
- 4. Measurements recorded in a science experiment
- 6. to move in a circle around another object
- 7. The distance across a circle