Redshift surveys give us:
A)an idea of how turbulent the intergalactic gas is.
B)a 3-D layout of galaxies in space.
C)the total mass of the universe.
D)a more accurate census of the Local Group.
E)a better value of the speed of light.

Question

Quizplus · Accepted Answer

Redshift surveys measure the redshift of galaxies, which can be used to determine their distance from us. This information is then used to create a 3-D map of the distribution of galaxies in space. Redshift surveys use the Doppler effect to measure the relative velocities of galaxies, which allows us to map out their positions in three-dimensional space. This gives us a better understanding of the large-scale structure of the universe and how galaxies are distributed. It does not provide information about intergalactic gas turbulence, the total mass of the universe, the Local Group, or the speed of light.

Redshift Surveys Give Us