Quaoar and Weywot
Quaoar and Weywot Two Hubble WFPC2 observations of Quaoar and Weywot taken on March 20 and 28, 2008 show the pair of Kuiper Belt Objects moving against the background of stars. These are two of the observations that were used to determine the mass of Quaoar from the size of Weywot's orbit. NASA / STScI / Michael Brown