On Sat, Feb 3, 2018 at 3:49 PM, <[email protected]> wrote: When you look at the night sky, it is mostly black, so there don't seem to > be as > many photons around as would be needed to account for dark matter (or dark > energy for that matter ;). Of course, I could be wrong, but that's my first > impression. >
Your eyes do not see the radio, infrared or microwave backgrounds, nor the high-energy gamma rays that are present. :) Eric
