Dark Matter/Dark Energy

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Across
  1. 3. The force that attracts objects with mass toward each other.
  2. 5. The process of the universe becoming larger in volume over time.
  3. 9. Invisible matter that does not emit light but has gravitational effects.
  4. 11. The collection of all space, time, matter, and energy.
  5. 12. A theory where the expansion of the universe reverses and collapses.
Down
  1. 1. Another name for the universe as an orderly system.
  2. 2. A repulsive force that drives the accelerating expansion of the universe.
  3. 4. Concluded from evidence rather than direct observation.
  4. 6. Matter Matter made of atoms that we can actually see.
  5. 7. A state of being unchanging or at rest; not expanding.
  6. 8. Large systems of stars and matter bound together by gravity.
  7. 10. To discover or identify the presence of something using instruments.