22. Outer Space

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Across
  1. 3. A space where there is no matter or air.
  2. 5. A small piece of rock or metal traveling through space.
  3. 7. Tiny bits of matter that stars are made of, or what's left after they die.
  4. 8. A very powerful explosion of a dying star.
  5. 10. A star that suddenly becomes much brighter.
  6. 12. A sudden burst of energy from our central star.
  7. 13. Changing another world to make it more like our home world.
  8. 14. The vast emptiness beyond our world's air.
Down
  1. 1. Another name for a small, rocky body orbiting a star, like an asteroid.
  2. 2. Something having to do with a world's orbiting natural satellite.
  3. 4. The feeling of having no weight, common in a vast emptiness.
  4. 6. A building with a large telescope for looking at space.
  5. 8. A vehicle that takes people and cargo into orbit and back.
  6. 9. A vehicle designed for travel in a vast emptiness.
  7. 11. A vehicle designed to explore the surface of another world.