The galaxy AGC 2217 is an active galaxy that once contained a highly active quasar. It is believed that the quasar has recently stopped emitting radiation.
Suggest why the quasar stopped emitting radiation.
AGC 2217 has a red shift of z=0.0340z = 0.0340z=0.0340.
Determine the distance from the Earth to AGC 2217. Give an appropriate unit for your answer. (Take the Hubble constant to be H0=68 km s−1 Mpc−1H_0 = 68\text{ km s}^{-1}\text{ Mpc}^{-1}H0=68 km s−1 Mpc−1 and the speed of light to be c=3.00×108 m s−1c = 3.00 \times 10^8\text{ m s}^{-1}c=3.00×108 m s−1.)
