A distant galaxy emits light that has a wavelength of 482.2 nm. On earth, the wavelength of this light is measured to be 485.6 nm. (a) Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give your answer to 4 significant digits. Use 2.998 x 108 m/s as the speed of light.) (a) The galaxy is from the earth. (b) Number i Units