In the 1920s, edwin hubble looked at the spectra of stars from distant galaxies. to his surprise, he found that all of these spectra were red-shifted, and that the more distant the galaxy, the greater the red-shift. what is a reasonable conclusion from this evidence? a. the star is relatively hot. b. the star is relatively cool. c. the star is moving rapidly toward us. d. the star is moving rapidly away from us.