Astronomy Review

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Across
  1. 3. Scientists' best theory about the origin of the universe (2 words)
  2. 5. The gigantic explosion at the end of large stars' lives
  3. 7. Chunks of rock and other debris that may orbit a star
  4. 11. A collection of billions of stars
  5. 12. Groups of stars that appear to form a picture in the sky
  6. 14. The biggest main sequence stars transform into these types of stars at the end of their lives (2 words)
  7. 16. Jupiter, Saturn, Uranus, and Neptune are this type of planet
  8. 17. A star is called this type of star in the middle of its life (2 words)
  9. 22. An event in which, from the Earth's perspective, the Moon becomes darker and red because it is passing through Earth's shadow, which in turn is caused by the Sun (2 words)
  10. 23. A motion in which an object spins around an internal axis
  11. 25. All matter, energy and space that we can observe
  12. 26. A term describing a galaxy that has a rounded, oval-like shape
  13. 27. At the end of a star's life, it transforms into one of these types of stars
  14. 28. A term describing a galaxy that has a swirl shape
  15. 29. Chunks of ice and dirt that often have very irregular orbits around stars
Down
  1. 1. The largest objects that orbit a planet
  2. 2. Regular patterns of ocean activity caused by the relative positions of the Sun and Moon
  3. 3. What the largest stars turn into after a supernova (2 words)
  4. 4. What a star turns into after its giant phase (2 words)
  5. 6. A ball of hot gas and plasma that gives off light
  6. 8. Large bodies that orbit a star
  7. 9. Mercury, Venus, Earth, and Mars are this type of planet
  8. 10. The idea that the Sun is at the center of the universe
  9. 13. What a star turns into if it was not quite big enough to turn into a black hole (2 words)
  10. 15. A term describing a galaxy that has no apparent pattern to its shape
  11. 18. An event in which, from the Earth's perspective, the Moon passes in front of the Sun and blocks out its light (2 words)
  12. 19. The path that an object in space follows
  13. 20. The idea that the Earth is at the center of the universe
  14. 21. A motion in which one object moves around another
  15. 24. Where stars are "born