Asked by KINA
Studying distant galaxies is described as looking back into the past. What does this mean?
(use terms light year, distance, and time in your answer)
(use terms light year, distance, and time in your answer)
Answers
Answered by
Steve
since it takes light some time to arrive at earth, we see what was happening when it left the galaxy, not now.
So, if the star is one light-year away, when we see the light, it shows what was happening one year ago.
Time travel!
So, if the star is one light-year away, when we see the light, it shows what was happening one year ago.
Time travel!
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