Neil deGrasse Tyson

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Across
  1. 2. What the universe is continuously doing, as described by Tyson in his work.
  2. 6. The field of physics that Tyson specializes in, focusing on stars, planets, and galaxies.
  3. 7. A celestial body reclassified as a dwarf planet with Tyson's help.
  4. 8. The force that keeps planets in orbit, frequently discussed by Tyson.
Down
  1. 1. The totality of everything in existence, often discussed by Tyson.
  2. 3. A cosmic object with gravity so strong that not even light can escape.
  3. 4. A TV series hosted by Tyson that explains the wonders of the universe.
  4. 5. The mysterious substance that makes up most of the universe but can’t be seen directly.