All Questions
3
questions
-1
votes
3
answers
671
views
Is light dark energy?
I was wondering if it was possible for light itself to be dark energy, might sound silly but it's been breaking my brain for months and I can't find any reason why not. If light can interact with ...
9
votes
4
answers
2k
views
Do photons make the universe expand?
I have a problem understanding the ideas behind a basic assumption of cosmology. The Friedmann equations follow from Newtonian mechanics and conservation of Energy-momentum $(E_{kin}+E_{pot}=E_{tot})$ ...
- 10.1k
3
votes
3
answers
620
views
How much of the universes mass is bound up in photons traveling between stars?
I was watching a Scott Manley video on youtube and he mentioned that the Sun was loosing 4 million tons of mass a second as it converts to energy.
With a few trillion trillion stars also converting ...
- 133