What is 2MASS redshift?
What is 2MASS redshift?
The 2MASS Redshift Survey (2MRS) aims to map the distribution of galaxies and dark matter in the local universe, out to a mean redshift of z = 0.03 (roughly equivalent to 115 Mpc or 370 million light-years).
How many galaxies have been redshifted?
An important “redshift survey” of about 18,000 galaxies was made from 1985 – 1995 by John Huchra and Margaret Geller. In the diagram below, all of the northern hemisphere sky is mapped to the half-circle.
What is the largest redshift in the universe?
The largest observed redshift, corresponding to the greatest distance and furthest back in time, is that of the cosmic microwave background radiation; the numerical value of its redshift is about z = 1089 ( z = 0 corresponds to present time), and it shows the state of the Universe about 13.8 billion years ago,…
What is the redshift of the gravitational force?
Gravitational redshift 1 G is the gravitational constant, 2 M is the mass of the object creating the gravitational field, 3 r is the radial coordinate of the source (which is analogous to the classical distance from the center of the object,… 4 c is the speed of light. More
