Hypothesis

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Across
  1. 2. Discovering or identifying a celestial object
  2. 4. When the universe is neither expanding nor contracting
  3. 7. Massive systems with stars,dust, stellar remnants and dark matter
  4. 8. Unexplained phenomena entities or questions
  5. 10. Matter Invisible form of matter
Down
  1. 1. Big freeze Scientific theory for ultimate fate of universe that expansion causes energy to disperse
  2. 3. Entire physical universe viewed as a complex and orderly system
  3. 5. the dominant force governing the motion of celestial bodies
  4. 6. totality of all matter,space, and time
  5. 9. Continuous increase in distance between objects