Things in Space

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Across
  1. 3. What our sun is
  2. 5. A series of planets, moons, asteroids, etc. orbiting a star
  3. 7. A force that draws objects to its center
  4. 8. Saturn's largest moon
  5. 9. What happens when a star implodes then explodes
  6. 11. Smallest planet in our solar system
  7. 14. So much gravity, not even light can escape
  8. 17. What a planet does to a star
  9. 18. Opposite of dark matter
  10. 20. A system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity
Down
  1. 1. Opposite of matter
  2. 2. A highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles
  3. 4. A ball of ice
  4. 6. Bowl-shaped depression
  5. 7. A type of light radiation
  6. 10. Largest planet in the solar system
  7. 12. Roman god
  8. 13. Dark part of the moon
  9. 15. Natural satellite of a planet
  10. 16. White part of the moon
  11. 19. Outer most inner planet