Jaime Rudas's latest activity

Dr. Becky Smethurst provides a summary of the latest analysis of JWST data by Freedman et al., indicating that there's no statistically...

Good catch. Thank you. Obviously I was talking about, and should have SAID I was talking about, the acceleration of expansion...

Yes, although it seems that it wasn't an unexpected surprise for everyone...

Are you talking about expansion or accelerating expansion?

If we designate the distance to the event horizon as ##D_{eh}## (which, by the way, is not 5 Mpc, but about 5 Gpc), then the maximal...

Equation 18 is Hubble's law (or, more precisely, the Hubble-Lemaître law). Yes

The total velocity is equal to the recession velocity plus the peculiar velocity, which is what includes the derivative of ##\chi##, as...

Also note that curvature in general is described by a rank 4 tensor and not a single number. In the case of the homogeneous and...

The behaviour of the scale factor is dependent on the energy content of the universe, which couples to the geometry through Einstein’s...

If you include ##\Omega_k## in the sum of Omegas you get 1 by definition. Regardless of the curvature.

Orodruin said in another thread that "the spacetime of a spatially flat universe generally has curvature". Is the expansion (or...

The "curvature density parameter" ##\Omega_k## is more of an indicator of how far from flatness a space is, than a true indicator of...

It seems to me that this interpretation is not entirely correct because it would imply that, for example, a positive curvature...

And, specifically, to the geometry of space.

The three frames agree what "now, here" means, but not what "now, over there" means. They've picked different 3d planes in 4d spacetime...