Stacked Color Composite -- Comet ISON
Date: 2 Nov 2013
A stacked color composite of the 2 November 2013 observations. Since Hubble tracked the comet, each red and blue image of ISON itself adds up in the same place, producing a clear, colorful image of the comet. The smeared-out background stars don't fare so well. Also visible are cosmic rays, which can be seen as small streaks angled in random directions, and the chip gap: a horizonal dead zone in the middle of the image.
Credit: Hubble Heritage Team