@SillyGoose just like how a theoretical physicist's training consists of ever higher sophistication of the treatment of QHO being considered simple, and of a HEP physicist considering ever heavier massive particles as massless Nambu Goldstone bosons.
Can I use this https://physics.stackexchange.com/a/811709/150174 to calculate the probability of life using empirical probability of parity symmetry?
0. Evolution is a process that assigns a probability that life can appear on any scale 1. Assume there exists an action which time evolves to give almost parity symmetric organisms and fit the proababilities based on that from earth 2. Can we use scaling arguments from FLRW metric + distribution of exoplanets + parity symmetry to find probability distribution of life habiting exoplanets?
Just some thoughts
I have to think harder on this
Conversation would help me clarify my thoughts
Actually FLRW metric + parity symmetry arguement = distribution of exoplanets?
Hi @JohnRennie ! I would like to ask you a question about one of your stack exchange posts (https://physics.stackexchange.com/questions/367083/radiation-from-cosmological-horizons).
I was having a conversation in another physics forum about horizons (like the event horizon of a black hole, or a cosmological horizon) emitting Hawking radiation and I mentioned that if the universe keeps an accelerating expansion there will be a radiating cosmological hoizon (as the universe approaches a de Sitter space) therefore culminating in an asymptotic non-zero temperature.
The radiation does not come from the horizon, just like Hawking radiation does not come from the black hole horizon.
Your correspondent is quite correct that particles emitted from the cosmological horizon would take an infinite time to reach us, but since the particles don't come from the horizon this isn't a problem.
Is it possible in GR to glue the boundary of a closed subset of a spacetime? What I mean is that can you glue 2 time-like separated leaves of a Cauchy foliation. I can't imagine that the resulting quotient space would be another subset of a spacetime?
