Space

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