Ecology

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Across
  1. 1. Confromed by Hydrogen, helium and heavy elements
  2. 3. A natural sattelite that goes around a planet
  3. 4. Conformed by stars, planets, etc.
  4. 6. It is everything, expanded into nothingness
  5. 8. The form where a planet goes AROUND a star
Down
  1. 1. Its a yellow star escential for life on earth
  2. 2. when a planet moves into its own axis
  3. 5. A rock that flies around the universe.
  4. 7. A planet that is around 900° F