Why are redshift and blueshift important to astronomers?(2 points) Responses To be able measure the mass of a Galaxy To know if something is moving away from us or toward us To be able to know what Galaxies are made of To be able to tell how fast something is moving
1. Redshift and blueshift are important to astronomers because they provide valuable information about the motion of celestial objects. By observing the shift in the wavelength of light emitted by objects, astronomers can determine whether an object is moving away from us (redshift) or towards us (blueshift). This motion can provide clues about the structure and dynamics of galaxies, stars, and other astronomical objects.
2. Redshift and blueshift are also crucial for measuring the distance of celestial objects and understanding the expansion of the universe. By analyzing the redshift or blueshift of light from galaxies, astronomers can calculate the speed at which those galaxies are moving away from us. This information helps astronomers map the distribution of galaxies in the universe and study the overall dynamics of cosmic expansion.