Big-Bang-Theory

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Across
  1. 2. the lightest, simplest, and most abundant chemical element, atomic number 1
  2. 4. the physical science that studies all celestial objects and phenomena beyond Earth's atmosphere, including stars, planets, galaxies, and the universe's structure
  3. 5. a pioneering American astronomer who transformed cosmology by proving the existence of galaxies outside the Milky Way and discovering that the universe is expanding.
  4. 10. is an American radio astronomer who, with Arno Penzias, discovered cosmic microwave background (CMB) radiation
  5. 13. the faint, nearly uniform relic glow of electromagnetic radiation left over from the Big Bang, filling all space
  6. 16. a massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter.
  7. 17. Helium ( is a colorless, odorless, tasteless, and inert noble gas with atomic number 2. It is the second lightest and second most abundant element in the universe, crucial for science due to its extremely low boiling point ( low density, and non-reactive, monoatomic nature.
  8. 18. the "free invention" of concepts and theories designed to logically represent the sensory experiences of the natural world
Down
  1. 1. was a Nobel Prize-winning German-American physicist and radio astronomer who co-discovered the cosmic microwave background (CMB) radiation in 1964. Working at Bell Labs, his accidental detection of this uniform, low-temperature radiation provided the definitive evidence for the Big Bang theory, transforming cosmology from speculation into a precise science.
  2. 3. British mathematician and astronomer known for developing the theory of stellar nucleosynthesis
  3. 6. the entire range of all possible frequencies, wavelengths, and photon energies of electromagnetic radiation, extending from low-energy radio waves to high-energy gamma rays
  4. 7. the totality of all space, time, matter, and energy
  5. 8. The visible light spectrum is the narrow portion of the electromagnetic spectrum—roughly 380 to 750 nanometers ( in wavelength—detectable by the human eye
  6. 9. the prevailing cosmological model explaining that the universe began approximately 13.8 billion years ago from an extremely hot, dense singularity
  7. 11. an apparatus for photographing or otherwise recording spectra.
  8. 12. the capacity to do work, cause change, or move matter, measured in joules
  9. 14. the stretching of light toward longer, redder wavelengths as an object moves away from the observer or as space expands
  10. 15. the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer.