Space Vocabulary Crossword Puzzle

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Across
  1. 2. This force holds together solar systems and galaxies.
  2. 4. An invisible force that acts as the glue of the universe.
  3. 6. The Universe is doing this.
  4. 7. The universe is expanding at a...
  5. 10. A leading cosmological theory predicting the universe will expand forever due to dark energy, causing all matter to drift apart.
Down
  1. 1. These systems are held together by supermassive black holes.
  2. 3. This contains everything in space.
  3. 4. An invisible force driving the accelerated expansion of the universe.
  4. 5. Any physical substance that has mass and takes up space.
  5. 8. The entire physical universe understood as a complex, orderly, and harmonious system.
  6. 9. This is released as light and heat through nuclear fusion.