MadSci Network: Astronomy |
Some months ago I asked how many photons were collected in the HST from very distant galaxies or pulsars.The answer given was "ten per second. I understand that the number of photons emitted 10 billion years ago was enormous ,but ,considering the amount of dark matter in the universe I cannot understand how even 10 got thru. My question then is: Is it possible that there was much less dark matter for much of the time the photons were on there way here?
Re: Dark matter and distant galaxies
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