The CMB is red-shifting due to the expansion of the universe. If the big bang wa...

		ben_w on March 20, 2025 \| parent \| context \| favorite \| on: 'More than a hint' that dark energy isn't what ast... The CMB is red-shifting due to the expansion of the universe. If the big bang was infinite then the CMB is also infinite, but at some point it becomes so redshifted that photons from it have a wavelength larger than the Hubble volume.