Dark Matter Crossword

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Across
  1. 7. anything that has mass
  2. 8. energy of the universe itself
  3. 9. the predicted end to our universe
Down
  1. 1. all matter than interacts with light
  2. 2. invisible matter
  3. 3. groups of stars and gas that orbit a super massive blackhole
  4. 4. to observe something in a meaningful way
  5. 5. contains everything to ever exist
  6. 6. attracting force throughout the whole universe
  7. 10. when you search for information