Puzzle #11

12345678910
Across
  1. 3. Synonym of 'beautiful'
  2. 4. Capital City of Italy
  3. 6. What a key opens
  4. 8. A four-legged domestic animal
  5. 9. The process of converting food into energy
  6. 10. Opposite of 'light'
Down
  1. 1. Another word for 'happy'
  2. 2. A person who studies the stars and planets.
  3. 5. Opposite of 'begin'
  4. 7. A device used for measuring time