3 ms·
Thermodynamics says there will be equilibrium, not that it will be all dark. But all the visible stars will run out at some point, and since nothing new can get
by flowerthoughts 2y ago
Thermodynamics says there will be equilibrium, not that it will be all dark. But all the visible stars will run out at some point, and since nothing new can get into that sphere, each place in space will be "dark" at some point.
What about the CMBR, I've never heard anyone say that's decaying, but surely it's not an infinite source of energy?
- ben_w 2y agoThe 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.
- adrianN 2y agoTo harness energy you need a gradient. Once everything will be in equilibrium there is no gradient.
- mr_mitm 2y agoIn the standard model, the temperature of the CMBR evolves reciprocally with the scale factor, so it will go to zero.