Recent content by orion1977

Thank you very much. You guys were very, very informative.

Okay, I'm getting two contradicting responses: 1. Entropy can grow indefinitely without reaching heat death (thermal equilibrium), per PeterDonis. 2. Entropy doesn't have to grow, per Chalnoth. But both points seem to agree that heat death doesn't rule out a universa with an eternal past (we...

So if the universe is (very, very speculatively) past eternal, then that still doesn't mean heat death must have already happened b/c entropy does not have to grow? In other words, the 2LOT does not automatically rule out a past eternal universe? That doesn't mean the universe has an eternal...

So if the universe is (speculatively) past eternal , then that still doesn't mean heat death must have already happened b/c entropy can indefinitely grow without reaching a heat death limit, or in the alternative, new universes may grow from quantum field phase transitions?

If the universe is past eternal, then why has it not reach heat death by now? If given infinite past time it should have already arrived at such a state and should exist in thermodynamic equilibrium. Some argue that the 2nd Law of Thermo rules out any possibility of a past eternal universe.

In the MinutePhysics video "How long is a day in the Sun?" it is said 24 hours on Earth is 86,400.0 seconds, but on the Sun 86,400.2 seconds would pass. However, if time passes slower with more massed objects, then wouldn't a twin on the Sun be younger than a twin on the Earth? If so, is the...