Evidence shows that interstellar bodies are moving away from earth, some faster than others, which best suggests that the universe a) is shrinking. b) is expanding. c) was not formed by a big bang. d) has always been the same size. our solar system is in the milky way galaxy. what shape is this galaxy? a) oval b) rectangular c) spiral d) triangular our solar system lies in a) the central ring of the milky way. b) one of the spiral arms of the milky way. eliminate c) in the galactic center of the milky way. d) outside the spiral arms of the milky way.