Vessot used a hydrogen maser sent up in a rocket to measure this effect for small distances to better than one part in ten thousand. Bondi argued that
Vessot used a hydrogen maser sent up in a rocket to measure this effect for small distances to better than one part in ten thousand. Bondi argued that this effect solved Olbers' Paradox for a steady-state universe. When it occurs in the cosmic microwave background radiation, it is called the Sachs-Wolfe effect. One type of it was discovered by the Ives-Stillwell experiment, and another via the Mossbauer Effect in Iron-57 in the Pound-Rebka experiment. Mathematically, it is usually expressed as any positive value of the dimensionless parameter called z. Vesto Slipher discovered it in galaxies, and Hubble used this to determine that the universe was expanding. FTP, name this effect that can be cosmological, gravitational, or Doppler, the displacement of spectral lines toward a longer wavelength, thus the opposite of blueshift.
Vessot used a hydrogen maser sent up in a rocket to measure this effect for small distances to better than one part in ten thousand.
{redshift} (accept {gravitational redshift} before “+”)