Dark Energy: What'd You Catch?

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Across
  1. 3. ____ energy suggests that space itself is producing the energy needed to push the universe outward: it is the energy of space
  2. 4. How much of our universe is composed of dark energy?
  3. 7. Who created the cosmological constant?
  4. 8. Who first realized the universe was expanding? (Last Name)
  5. 9. a way astronomers use to tell the distance of any object that is very far away in the universe
Down
  1. 1. New theory of ______ states that the accelerating expansion of the universe is not due to dark energy, but rather, due to a theory of gravity that scientists have not formulated yet.
  2. 2. If it is true, it is the 5th fundamental force in nature.
  3. 5. How do scientists measure dark energy?
  4. 6. Dark energy causes gravitational fields to be ____
  5. 10. The first evidence from dark energy came from ____