Galaxy UGC 9391This Hubble Space Telescope image shows one of the galaxies in the survey to refine the measurement for how fast the universe expands with time, called the Hubble constant.Credits: NASA, ESA and A. Riess (STScI/JHU) Download Share Tags Hubble Space TelescopeImage CreditNASA, ESA and A. Riess (STScI/JHU)Size1024x771px