BEYOND EARTH

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Across
  1. 7. One of the two deflection strategies used on asteroids
  2. 8. Cooler regions found in the photosphere
  3. 10. The comet with the longest tail discovered in 1996
  4. 11. Another name for the Triangulum galaxy
  5. 13. Father of Modern Rocketry
  6. 18. Variable stars
  7. 19. Edwin Hubble's book
  8. 20. The stage in the universe's creation that followed inflation
  9. 22. The Russian city hit by a meteorite on February 15, 2013
  10. 25. Most common type of galaxy
Down
  1. 1. A pattern exhibited by cut stony-iron meteorites
  2. 2. Used to describe the levels of the Torino scale
  3. 3. Largest galaxy in the Local Group
  4. 4. Extrasolar planet
  5. 5. Cause of the blue tinge on Pegasus' atmosphere
  6. 6. A collective term for the gas giants; _____ planets
  7. 9. Host star of HD 209458 b aka Osiris
  8. 12. An indirect method of finding exoplanets using radial velocity
  9. 14. Classification of Proxima Centauri
  10. 15. A period of time when the universe was extremely small
  11. 16. The study of heavenly bodies
  12. 17. The Greek word for law
  13. 21. An irregular galaxy named M82
  14. 23. The center of a galaxy's disk bulge
  15. 24. The large, dim region surrounding the entire galaxy