Astrophysics for People in a Hurry

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Across
  1. 2. Takes up 68% of mass-energy in the universe
  2. 5. A type of telescope that sees black holes the best
  3. 7. The study of space that involves using chemistry and physics to understand the universe
  4. 8. Objects want to be this 3D shape
Down
  1. 1. An element most common at the 6-mile mile asteroid impact zone
  2. 3. Holds the universe together and is the explanation for gravity
  3. 4. Neil ____ Tyson
  4. 6. Nothing can be faster than this speed