This quantity can be determined by measuring the tip of the red giant branch.
This quantity can be determined by measuring the tip of the red giant branch. The pixelization of galaxy images causes apparent surface brightness fluctuations whose amplitudes are used to find this quantity. [Read the following two sentences slowly] The integral, from zero to z, of one over H-of-z relates redshift and this quantity. 5 times the base-10 logarithm of this quantity, minus 5, is equal to the difference between the apparent and absolute magnitudes, which is called this quantity's namesake (*) "modulus." Supernovae are calibrated by Cepheids, which are in turn calibrated via parallax, in the cosmic "ladder" named for this quantity. Standard candles are used to calculate this quantity, which is linearly proportional to recession velocity in Hubble's law. For 10 points, name this quantity measured in parsecs, which is 1 AU between the Earth and the Sun.
This quantity can be determined by measuring the tip of the red giant branch.
distance [accept comoving distance or distance modulus or cosmic distance ladder] &lt;JL, Astro&gt;