04:53: ... spectrograph takes incoming light and breaks it into its component wavelengths, similar to a prism, and it records how much energy is received at each ...
2017-06-07: Supervoids vs Colliding Universes!
05:46: ... in layman's terms, they split the light from those galaxies into component wavelengths and determined the shift in the wavelengths of those spectra due to the ...
