Big-Bang-Theory

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Across
  1. 2. Big Bang Nucleosynthesis (early element formation), Abundance (75% ______, 25% Helium), Protons/Neutrons (fundamental particles), and Cosmic Microwave Background (leftover radiation)
  2. 3. the expansion of the universe, where galaxies move apart, leading to redshift (wavelength stretching) and cosmic microwave background radiation (afterglow).
  3. 6. accidentally discovered cosmic microwave background (CMB) radiation
  4. 7. Because the expanding universe has cooled since this primordial explosion, the background radiation is in the microwave region of the electromagnetic spectrum
  5. 10. expansion, cosmic background radiation (afterglow), red shift (evidence of receding galaxies), and nucleosynthesis (formation of light elements)
  6. 11. indicates a celestial object is moving toward an observer,causing light waves to compress and shift toward shorter, bluer wavelengths
  7. 12. The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view. More simply, this range of wavelengths is called visible light. Typically, the human eye can detect wavelengths from 380 to 700 nanometers.
  8. 13. nuclear energy, electromagnetic radiation, and the expansion that stretched energy into cosmic microwave background radiation
  9. 15. an instrument that separates light from celestial objects into a spectrum to analyze composition, velocity, and temperature
  10. 17. discovered the cosmic microwave background (CMB) radiation
Down
  1. 1. faint, nearly uniform radiation filling the universe,representing the cooled remnant 'first light' form the Big Bang, released roughly 380,000 years after the universe's birth.
  2. 4. singularity (initial point), expansion (stretching of space), redshift (evidence of moving galaxies), and Cosmic Microwave Background (afterglow radiation)
  3. 5. expansion, curvature, spacetime, gravity, and the cosmological constant
  4. 7. provided the foundational observational evidence for the Big Bang theory by proving the universe is expanding
  5. 8. the stretching of light to longer,redder wave lenths as galaxies moves away in an expanding universe.
  6. 9. Within the first three minutes, nuclear fusion created a primordial mixture of roughly 75% hydrogen and 25% helium, a consistent ratio observed throughout the universe that supports the theory.
  7. 14. the leading scientific theory that the universe expanded from an extremely hot, dense state roughly 13.8 billion years ago
  8. 16. argued that the universe was eternal, expanding, and creating matter to maintain constant density, viewing the Big Bang as "irrational" and "ridiculous"