Across
- 4. The explosion is how scientists think the Universe began 15 million years ago
- 6. Reclassified as a dwarf planet in 2006
- 7. Second largest moon in the solar system
- 8. The brightest star in each constellation
- 10. Formed from cloud and dust
- 12. Black holes and white holes join to form tunnels
- 13. Have not been proven to exist and may violate one of the fundamental laws of physics
- 16. Lumps of rock that orbit the sun
Down
- 1. The galaxy we live in
- 2. Unit of measurement
- 3. Most of the constellations were identified long ago by start gazers in Babylon and ___
- 5. Visible surface layer of the sun
- 9. Artemas ii
- 11. Currently considered the largest black hole
- 14. Named after the Roman messenger god
- 15. Bright objects with long tails