Galaxy * It is a collection of billions of stars. * Resembling human beings or animals. * There are billions of galaxies in the Universe. * There are not many galaxies, which are visible to the naked eyes. read more
Constellation. It is a collection of only a few stars. Stars in the constellation are arranged in patterns resembling human beings or some animals. There are only about 88 constellations. There are many constellations, which can be observed with the help of naked eyes. read more