Comet ISON is potentially the "comet of the century" because around the time the comet makes its closest approach to the Sun on November 28 it may briefly become brighter than the Full Moon. Right now the comet is far below naked-eye visibility, and so Hubble was used to snap the view of the approaching comet. // NASA/ESA/J.-Y. Li (Planetary Science Institute)/and the Hubble Comet ISON Imaging Science Team