Astronomy

4047 readers

32 users here now

founded 2 years ago

MODERATORS

Sal@mander.xyz

177

Study: Dark matter does not exist and the universe is 27 billion years old (www.earth.com)

submitted 8 months ago by saint@group.lt to c/astronomy@mander.xyz

57 comments fedilink hide all child comments

Heh

you are viewing a single comment's thread
view the rest of the comments

[–] atzanteol@sh.itjust.works 8 points 8 months ago (2 children)

Seems energy is not conserved.

https://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved/

The thing about photons is that they redshift, losing energy as space expands. If we keep track of a certain fixed number of photons, the number stays constant while the energy per photon decreases, so the total energy decreases.

[–] Scribbd@feddit.nl 1 points 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.

[–] Live_your_lives@lemmy.world 1 points 8 months ago* (last edited 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.