Across
- 2. Another word used to describe the universe as a whole.
- 5. The distance light travels through space in one year.
- 7. The changing appearance of the Moon as seen from Earth.
- 8. An imaginary line around which a planet rotates.
- 9. Tiny particles of matter found throughout space.
- 10. The line where the sky appears to meet the ground.
Down
- 1. The point in the sky directly above an observer.
- 3. A force that helps create magnetic fields around some planets.
- 4. Energy that travels through space as waves or particles.
- 6. Matter that forms many clouds, stars, and planets in space.