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