Space, Galaxies, and More

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Across
  1. 1. Does the temperature decrease or increase the more the universe expands?
  2. 3. A theory that suggests our universe is always expanding.
  3. 7. A particle smaller than an atom.
  4. 8. Leftover radiation from the Big Bang. Oldest microwaves in the universe.
  5. 9. The name of the man who made the theory of relativity.
  6. 10. Made up of all matter and space that exist
Down
  1. 2. The man who discovered galaxies are moving apart from each other.
  2. 4. Universe was full of them when it began. They helped form the objects in our universe and are what matter is composed from.
  3. 5. Used to study light
  4. 6. First two elements on Earth.