Which of the following best describes the 'cosmological redshift'?
Question 2
Hubble's Law describes a linear relationship between a galaxy's recession velocity and its distance. If a galaxy is observed to be $100 \text{ Mpc}$ away and has a recession velocity of $7000 \text{ km/s}$, what is the approximate value of the Hubble constant ($H_0$)?
Question 3
The concept of 'expanding space' implies that galaxies are not moving through space, but rather that:
Question 4
Which of the following observational pieces of evidence, in addition to redshift, supports the idea of an expanding universe?
Question 5
Type Ia supernovae are crucial 'standard candles' in cosmology because they:
