“Energy is conserved in general relativity, it’s just that you have to include the energy of the gravitational field along with the energy of matter and radiation and so on.”
Quote taken from Atzanteol’s article below.
Comment on Study: Dark matter does not exist and the universe is 27 billion years old
xionzui@sh.itjust.works 8 months agoThis doesn’t answer the question in the context of this theory, but the current understanding is that light does lose energy as it travels through expanding space. As the space it’s in expands, the wavelength gets longer, and the energy goes down. It doesn’t go anywhere; energy just isn’t conserved in an expanding space-time.
Live_your_lives@lemmy.world 8 months ago
atzanteol@sh.itjust.works 8 months ago
BTW, thanks! This comment sent me down a fascinating rabbit hole. It had simply never occurred to me that energy conversation didn’t apply in an expanding universe!
HereIAm@lemmy.world 8 months ago
If the light loses energy, then it must surely lose it to something? And if your last point that energy isn’t being conserved in our universe, in which case we are either in some deep shit with the first law of thermodynamics, or our universe isn’t an isolated system.
atzanteol@sh.itjust.works 8 months ago
Seems energy is not conserved.
preposterousuniverse.com/…/energy-is-not-conserve…
Live_your_lives@lemmy.world 8 months ago
Further into the article he says that, "It would be irresponsible of me not to mention that plenty of experts in cosmology or GR would not put it in these terms. We all agree on the science; there are just divergent views on what words to attach to the science. In particular, a lot of folks would want to say “energy is conserved in general relativity, it’s just that you have to include the energy of the gravitational field along with the energy of matter and radiation and so on.” " So energy is conserved on the whole, it’s just not conserved if you consider photons apart from their greater context.
Scribbd@feddit.nl 8 months ago
Ok. Smarter people probably thought of this, and probably found my hypothesis to be impossible. But what if… It is the the other way around. What if photons are losing energy because they are expanding spacetime. Like tiny little springs expanding out.
SkyeStarfall@lemmy.blahaj.zone 8 months ago
The universe is actually not conserved across the universe, as it is currently understood, because of the expansion of space.
The actual conversation of energy ‘rule’, is a bit more specific.