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Galaxies and Cosmology — quick quiz

3 NSEA-pattern questions on Galaxies and Cosmology. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 3

Hard

A galaxy shows a redshift z = 0.05. Assuming Hubble's constant H₀ = 70 km/s/Mpc, what is the approximate recession velocity of this galaxy in km/s?