Question 1
What does the Hubble constant ($H_0$) indicate about the universe's expansion?
Question 2
Which equation relates the distance to a galaxy with its redshift in an expanding universe?
Question 3
In the context of the Friedmann equations, what does the curvature parameter ($k$) represent?
Question 4
If the scale factor ($a(t)$) is increasing, what does this imply about the universe?
Question 5
What is the significance of redshift ($z$) in cosmology?
