In the spectrum of the galaxy, the hydrogen line λ = 656.3 nm is shifted to the red end of the spectrum by Δλ = 21.9 nm. Determine the speed of removal of the galaxy and the distance to it
z = Δλ / λ = 21.9 / 656.3 = 0.033369
v = c * z = H * r, where the Hubble constant H = 73 km / (s * MPc)
v = 300000 * 0.033369 = 10011 km / s
r = v / H = 10011/73 = 137 megaparsec
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.