Question

How does looking at distant galaxies allow us to look back in time?

Answer 1

Answer:

By looking at the present-time state of a beam of light, we can thus infer what the galaxy that created the light looked like millions of years ago. ... This image shows the galaxy NGC 5010, which is 140 million light-years away.

Answer 2

Again here for answering,

Q. How does looking at distant galaxies allow us to look back in time?

=> By looking at the present-time state of a beam of light, we can thus infer what the galaxy that created the light looked like millions of years ago. This image shows the galaxy NGC 5010, which is 140 million light-years away.

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