Across
- 1. a huge collection of gas, dust, and billions of stars and their solar systems
- 3. giant a giant planet composed mainly of hydrogen and helium
- 5. luminous ball of gas
- 7. containing billions of galaxy
- 8. orbiting the earth
- 9. hole nothing can escape this
- 11. planet Pluto was reclassified as this in 2006
Down
- 2. year distance that light travels in one year
- 4. a powerful and luminous stellar explosion
- 6. star at the center of the solar system
- 8. piece of stony or metallic debris
- 10. the third planet for the sun