The Big Bang Theory Vocab

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Across
  1. 2. The simplest, lightest, and most abundant chemical element in the universe.
  2. 4. The study of everything in the universe beyond Earth's atmosphere.
  3. 5. A groundbreaking American astronomer who proved that other galaxies exist outside the Milky Way and discovered that the universe is constantly expanding.
  4. 10. American avant-garde theater director, playwright, and visual artist.
  5. 13. Cosmic Microwave Background radiation is the leftover heat and light from the Big Bang, filling all space in the universe.
  6. 16. A massive, gravitationally bound system consisting of stars, stellar remnants, gas, dust, and dark matter.
  7. 17. A colorless, odorless, tasteless, and nonflammable gas that is the second lightest and second most abundant element in the universe.
  8. 18. German-born theoretical physicist is widely considered one of the most influential scientists of all time.
Down
  1. 1. German-American physicist and radio astronomer.
  2. 3. Prominent English astronomer and astrophysicist known for explaining how elements are created inside stars.
  3. 6. The entire range of all possible frequencies of electromagnetic radiation, which travel in waves and transport energy.
  4. 7. Absolutely everything that exists: all space, time, matter, and energy.
  5. 8. The narrow range of electromagnetic radiation that the human eye can perceive, spanning colors from violet to red.
  6. 9. The leading scientific explanation that the universe began roughly 13.8 billion years ago from an extremely hot, dense point and has been expanding and cooling ever since.
  7. 11. An instrument that breaks up a wave into a frequency spectrum.
  8. 12. The capacity or ability to do work, cause change, or move matter.
  9. 14. The stretching of light waves as an object moves away from the observer, causing the light to shift toward the red end of the spectrum.
  10. 15. The compression of light waves from an object moving toward an observer, causing its light to shift toward the blue/violet end of the spectrum.