Quote:
|
With all the 'expansion' going on, gravity is still powerful enough such that our Milky Way and the Andromeda Galaxy are expected to collide in the distant future.
|
Counterintuitive is it not? It's uphill both ways.
Red shift my not be just one thing.
duckduckgo.com/?q=red+shift+of+connected+features+in+space&ia=web
Quote:
https://arxiv.org › abs › 2007.00704
[2007.00704] Modeling features in the redshift-space halo power ...
This is the first demonstration that perturbative models can accurately fit the redshift-space clustering of biased tracers in N-body simulations of such theories. By comparing different theoretical models and IR resummation schemes we assess the current theoretical uncertainty in predicting power spectra for models with features.
https://arxiv.org › abs › 1509.08232
[1509.08232] Understanding redshift space distortions in density ...
One of the most important features of density-weighted velocity statistics in redshift space is the change in sign of the cross-correlation between the density and density-weighted velocity at mildly small scales due to nonlinear redshift space distortions. Our model can explain this characteristic feature without any free parameters.
|
IIRC age of feature was a parameter.