The Universe

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Across
  1. 2. Cloud of gas and dust in space
  2. 5. Aging large star
  3. 9. Between stars
  4. 13. Study of the universe
  5. 16. Point of infinite density in a black hole
  6. 18. Light display near Earth’s poles
  7. 19. Region with gravity so strong nothing escapes
  8. 20. Icy body with a glowing tail
  9. 22. Distance light travels in one year
  10. 23. Orbits a star, massive enough to be round
  11. 26. Extremely bright distant object powered by a black hole
  12. 28. Exploding star
  13. 30. Invisible matter in the universe
Down
  1. 1. Group of stars forming a pattern
  2. 3. dwarf Small, dense dying star
  3. 4. The universe as an ordered whole
  4. 6. Vast system of stars, gas, and dust
  5. 7. Force pulling objects toward each other
  6. 8. Famous space probe exploring the solar system
  7. 10. Planet outside our solar system
  8. 11. Relating to the sun
  9. 12. When one body blocks another’s light
  10. 14. Event that created the universe
  11. 15. Luminous sphere of gas in space
  12. 17. Natural satellite of a planet
  13. 21. Space rock entering Earth’s atmosphere
  14. 24. Rapidly spinning neutron star emitting radiation
  15. 25. Small rocky body orbiting the sun
  16. 27. Particle in the nucleus of an atom
  17. 29. Path of a celestial body around another