"This Tiny Animal Is Apocalypse-Proof" Crossword Puzzle

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Across
  1. 4. related to the end of the world or a major disaster.
  2. 11. a very strong and sudden release of energy in space.
  3. 12. harmful energy that comes from sources like the sun or nuclear reactions.
  4. 13. a powerful explosion of a star in space.
  5. 14. related to space, stars, and planets.
  6. 15. a path that will lead to two objects crashing into each other.
Down
  1. 1. very harsh or dangerous environments (like very hot, cold, or dry places).
  2. 2. an area with no air or matter, like outer space.
  3. 3. very small living things that can only be seen with a microscope.
  4. 5. to completely destroy or wipe out something.
  5. 6. a very large, aging star that has expanded and cooled.
  6. 7. a large rock that moves through space and can sometimes hit planets.
  7. 8. difficult or unsafe for living things to survive in.
  8. 9. a living thing that can survive in very harsh environments.
  9. 10. tiny, eight-legged microscopic animals that can survive extreme conditions.