Jun 6, 2021 · Are astronomy and cosmology same? If not, what are the differences? And which one is greater in terms of subject area?

Sep 15, 2019 · I'm reading Harrison's "Cosmology: Science of the universe" because Harrison focuses on the distinction between cosmological redshift (he calls it expansion redshift) and the Doppler …

Dec 5, 2023 · This is where my question begins: are there any areas of astronomy that require knowledge of both engineering (design, prototyping, modeling and testing) and …

Oct 10, 2021 · I have covariance matrices and Markov chains coming from the SCP (Supernova Cosmology Project) and I would like to plot all these data in the particular diagram Omega_Lambda …

Feb 14, 2022 · Firstly, I think it's important to note that in general relativity there is only one redshift, and that a cosmological redshift can be interpreted as the result of infinitely many infinitesimal redshifts …

How are redshift, (recessional) velocity and distance of a galaxy related? I understand what v=HD states. So I assume that Hubble measured a direct relation between the distance and recessional vel...

The definition of the angular diameter distance is the ratio of an object's physical transverse size to its angular size. However when I was reading my textbook, Astrophysics in a Nutshell by Dan M...

May 14, 2017 · While the angular diameter turnover is often explained in terms of the expansion of the universe, the more direct physical cause is that gravitational lensing by the universe's homogeneous …

As I understand the question, it sounds backwards. Usually one takes the flux measurements and uses a reference to determine the magnitude.

May 23, 2017 · Astronomy does tend to keep historical conventions around (see magnitudes), but using the name metallicity does have some use. In many cases objects, like stars, can be classified into …