The Big Bang Theory Vocab

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Across
  1. 2. The lightest, simplest, and most abundant chemical element in the universe.
  2. 4. The scientific study of everything beyond Earth’s atmosphere.
  3. 5. An American astronomer who proved that the universe is expanding and that galaxies exist outside our own Milky Way, fundamentally changing how we understand the cosmos.
  4. 10. An American astronomer who won the 1978 Nobel Prize in Physics for discovering the "echo" of the Big Bang, which proved how the universe began.
  5. 13. The faint, leftover light and heat from the Big Bang, filling all space uniformly.
  6. 16. A massive, gravitationally bound system consisting of stars, stellar remnants, gas, dust, and dark matter.
  7. 17. A chemical element (symbol He, atomic number 2) that is a colorless, odorless, tasteless, and non-flammable noble gas.
  8. 18. A German-born theoretical physicist (1879–1955) who revolutionized the way we understand the universe.
Down
  1. 1. An American radio astronomer who, along with Robert Wilson, accidentally discovered the Cosmic Microwave Background (CMB) in 1964.
  2. 3. All elements heavier than helium are created inside stars, a process known as nucleosynthesis.
  3. 6. The entire range of all possible frequencies of electromagnetic radiation, which travel in waves and transport energy.
  4. 7. The sum total of all existing matter, energy, space, and time.
  5. 8. The narrow range of electromagnetic radiation (light energy) that the human eye can detect, typically spanning wavelengths from about 380 to 750 nanometers.
  6. 9. The prevailing scientific model explaining that the universe began approximately 13.8 billion years ago from an extremely hot, dense point (singularity) and has been expanding and cooling ever since.
  7. 11. An instrument that splits light (or other electromagnetic radiation) into its component colors, or wavelengths, and records this pattern, called a spectrum.
  8. 12. The capacity or ability to do work, cause change, or move matter.
  9. 14. The stretching of light waves from an object (like a star or galaxy) moving away from an observer, causing the light to appear redder.
  10. 15. The decrease in wavelength (and increase in frequency) of light emitted by an object moving toward an observer.