Gravity

1. Time moves faster for your head than for your toes.
2. The law of Cosmic Laziness states that objects want to move slowest possible through time

Thus you get pushed towards earth, i.e. you feel gravity

What if the CMB is just blackbody radiation because of the Unruh effect

What if the CMB is just blackbody radiation because of the unruh effect? It would explain why it is so smooth and similar everywhere. Like the event horizon of the big bang is given it off or something, or basically the mass.

Does spacetime have inertia?

Warning: crackpot-theory inbound:

So I wonder, does a piece of space-time have inertia? That question probably doesn’t even make sense, because a piece of space-time can’t really have a velocity. Because it ‘contains’ time. Somehow it can oscillate.

Or does space-time behave like a fluid? Having viscosity terms. Isn’t the universe just a suspension of stars in photon gas and space-time?

I always wondered if there are connections between the navier-stokes equations einstein-field equations, especially since the latter appear to be thermodynamic.

How would space-time look inside a rotating spherical shell?

Would inertial waves arise?

Well, space-time has energy density and thus has inertia via the ‘Energy-mass equivalence’

https://en.wikipedia.org/wiki/Inertial_wave