... 3.02.1997 . ... NASA , Explanation: Galaxies are made up of stars, but are all stars found within galaxies ? ... Using the Hubble Space Telescope, researchers exploring the Virgo Cluster of galaxies have now found about 600 red giant stars adrift in intergalactic space . ... Possibly ejected from their home galaxies during galaxy-galaxy collisions , these isolated suns may well represent part of a large, previously unseen stellar population, filling the the space between Virgo cluster galaxies . ...