7. Yes or No, Do we have seasons due to the Earth's tilt in relation to the Sun? 8. Yes or No, Do we have seasons due to the Earth's changing distance to the sun?

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted