Stephan s Quintet . ... Image Data: Hubble Legacy Archive , ESA , NASA ; Processing: Hunter Wilson Explanation: The first identified compact galaxy group, Stephan's Quintet is featured in this eye-catching image constructed with data drawn from the extensive Hubble Legacy Archive . About 300 million light-years away, only four galaxies of the group are actually locked in a cosmic dance of repeated close encounters. ... But the larger bluish galaxy, NGC 7320, is much closer than the others. ...