The Big Bang Theory

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Across
  1. 2. A chemical element, it has the symbol H and atomic number 1.
  2. 4. the study of objects and phenomena beyond Earth.
  3. 5. An American astronomer who established the field of extragalactic sdtromany proving that galaxies exsit outside of the milky way.
  4. 10. American astronomer and Nobel laureate.
  5. 13. The cooled remnant of the firstlightthat could ever travel freely through the Universe.
  6. 16. A huge collection of gas,dust, and billions of stars
  7. 17. A colorless odorless gas.
  8. 18. A German-born Theoretical physicist
Down
  1. 1. American physicist and radio astronomer.
  2. 3. Held controversial viewsonsome scientific matter
  3. 6. The range of all types on EM radiation
  4. 7. The total ofspace, and all the matter and energy that space contains
  5. 8. The segment of the electromagnetic spectrum that the human eye can view.
  6. 9. The way the universe began.
  7. 11. An instruemn for dispersing radiation.
  8. 12. The ability to exert a force causing displacement of an object.
  9. 14. When something is moving away from us, the sound or light waves emitted by the object are stretched out.
  10. 15. When something is moving towars us, and the sound or waves have a shorter wave length.