Science crossword puzzle

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Across
  1. 2. Real name of the sun.
  2. 4. Albert Einstein's famous equation.
  3. 6. A device that spins & seperate light & heavy elements.
  4. 9. Uranium & Plutonium have this in common.
  5. 11. Another word for alien.
Down
  1. 1. Someone who does science.
  2. 3. Real name of the moon.
  3. 5. The science of organic living things.
  4. 7. A big rock in space.
  5. 8. Something that spins around a planet is called an ___.
  6. 10. Deoxyribonucleic acid also known as ___.
  7. 12. What was before DNA.