The NASA/ESA Hubble Space Telescope unmasks a ghost galaxy 👻 in this #HubbleTopImage Astronomers used Hubble to unmask the dim dwarf galaxy Leo IV, which is practically invisible! This image shows how the handful of stars from the sparse galaxy are virtually indistinguishable from the background. More than a dozen ultra-faint dwarf galaxies like Leo IV lurk around our Milky Way galaxy. They are dominated by dark matter, an invisible substance that makes up most of the Universe’s mass. For more information check the link in bio. 📷 NASA, ESA, and T. Brown (STScI) #ESA #Hubble