Viewing a single comment thread. View all comments

ApplicationRoyal1072 t1_je9xh3y wrote

Reply to comment by calligraphizer in The brightest gamma-ray in human history hit our planet this past Fall by PuzzleheadedOne1428

Because of expansion of the universe radiation frequency changes with time/distance from any radiation source. Doppler effect. Add diffusion .

3

calligraphizer t1_jecr9b9 wrote

Only across cosmological distances. This would be negligible for gamma rays emitted within, say, the local group, which is gravitationally bound against Hubble flow.

1