c) Galaxy A is moving away from us faster than Galaxy Bis DIS moving Galaxy B is

Question

c) Galaxy A is moving away from us faster than Galaxy Bis DIS moving Galaxy B is moving towad u. toward us faster than Galaxy A is moving toward us astr than d) Galaxy B is moving away from us faster than Galaxy A is 3. Here is a representation of our Observable Universe The black circles represent galaxies (not to scale) a) What is located at the center of the Observable Universe, marked X? b) We can see galaxy W. Circle TRUE or FALSE ver a galaxy that is moving away from you, circle two correct answers e to determine its age. c) Which galaxy looks youngest to us, Y or Z datermine its speed

Explanation / Answer

a) observer b)false because it is out of observable universe

c)Y looks youngest to us because of doppler effect

The Doppler Effect is evidence that the universe is expanding. When stars or galaxies are moving away from us, we see their color as red shifted. Because the distant galaxies are red shifted, this means that they are all receding with respect to Earth. In the theory of Special Relativity, Albert Einstein predicted that spacetime itself is expanding.

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