Across
- 2. Smallest planet in our solar system
- 3. Light in galaxies shifting towards the red end of the spectrum
- 6. Dense matter which no light or matter can escape
- 7. Chunks of ice dust and rock that orbit the sun
- 9. Biggest star in space
- 10. 4 times wider than the earth
- 12. Has 1.7 million asteroids
- 13. Has 7 rings and 7 gaps
- 15. As the universe cools energy turns into matter/hydrogen
Down
- 1. Is a gas giant and has a solid inner core that is the size of earth
- 2. Size of dust particles
- 4. Small things that glow in space
- 5. 14 known moons named after greek sea gods
- 8. There are _ planets
- 11. Rotates backwards on its axis
- 14. Too small to be considered planets