With redshift, energy is lost. Where does it go?
8077
Photons in expanding space: how is energy conserved?
137250
What happens to the rotational kinetic energy?
113659
Why was the universe in an extraordinarily low-entropy state right after the big bang?
3108
Why does space expansion not expand matter?
76365
Why do galaxies "disappear?"
2377
Is the total energy of the universe zero?
29399
Why does inflation (the inflaton field) push Omega down closer to zero (flatten the universe)?
110021
extracting energy from cosmological expansion
112411
What happens when a photon reaches the "edge" of the universe?
19163
Why does the amount of energy transferred depend on distance rather than time?
141520
Night light and Redshift don't work
72913
Why does a light wave fade as it travels through space?
148341
What caused the expansion of the universe to slow down after the inflationary epoch?
74958
Dark age of universe when all fusion process ceases?
145238
Where does the energy required to stop a moving body come from and go?
52598
How can I interpret "energy" in signals?
9207
How do gas molecules constantly bounce without losing energy?