Space Unit 3 - Our world 5

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Across
  1. 3. A rock crashing through earths atmosphere.
  2. 5. ______ are also called extraterrestrials.
  3. 6. A _____ is a cloud of rock, ice and gas that orbits the Sun.
  4. 8. There may be planets out there, that has an _____ with Oxygen.
  5. 10. ______ keeps data on comets to know when they will appear.
  6. 11. Other planets also _____ the Sun.
  7. 12. Stars and solar systems make up a _____.
Down
  1. 1. There are more galaxies in our _____ than there are stars in a galaxy.
  2. 2. Do you think that _____ may live on one of the planets?
  3. 4. The Sun is a _____ like the stars in the night sky.
  4. 7. The _____ orbits the earth.
  5. 9. Earth is a _____ that moves around the Sun.