In what order do the Sun, Moon and Earth need to be in for a lunar eclipse to occur? The Sun, Earth then Moon
The Earth, Sun then Moon
The Sun, Moon then Earth
The Moon, Sun then Earth

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