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In our modern view of the expansion of the universe, we understand that it is space that is stretching; individual galaxies don't speed away from each other as if they were…

In our modern view of the expansion of the universe, we understand that it is space that is stretching; individual galaxies don't speed away from each other as if they were…
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In our modern view of the expansion of the universe, we understand that it is space that is stretching; individual galaxies don't speed away from each other as if they were rockets. In that case, why do galaxies show a redshift?

User Alice Wonder
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Answer:

as space stretches, the waves of radiation in space also stretch and their wavelength increases

Step-by-step explanation:

User Burt Beckwith
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