How do observations of galaxies at different distances help us learn about galaxy evolution?
A)We can observe the evolution of a single galaxy over time.
B)We can observe galaxies at different distances merge, helping us learn how mergers affect evolution.
C)Observations of the most distant galaxies will allow us to observe the birth of galaxies.
D)Observations of different distances show galaxies of different ages and therefore different stages of evolution.
E)We can see what our galaxy used to look like over time, helping us theorize about the physical processes that led to its current appearance.

Question

Quizplus · Accepted Answer

Observations of different distances show galaxies of different ages and therefore different stages of evolution. By observing galaxies at different distances, we are essentially looking back in time as it takes light time to reach us from those distant galaxies. This allows us to see galaxies at different stages of their evolution, from the early Universe to more recent times. This can help us understand how galaxies have evolved over time and the processes that have led to their current appearances.

How Do Observations of Galaxies at Different Distances Help Us