Space Crossword Puzzle

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