Space

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Across
  1. 3. The largest documented diamond in the Universe; named after a Beatles song
  2. 4. The most complex object in the Universe
  3. 6. The first person to look into space with a telescope
  4. 8. A collection of 8 planets orbiting around the Sun
  5. 9. The only known rocky planet with living things inhabiting it
  6. 10. The only planet in the Solar System whose day is longer than its year
Down
  1. 1. The tallest mountain in the Solar System
  2. 2. The most powerful things in the Universe; bigger than supernovas
  3. 5. The fastest spinning objects in the Universe; also known as neutron stars
  4. 7. The brightest things in the Universe