A stacked image of comet ISON enhances the brilliant detail of the comet's sweeping tail.
Taken on Nov. 19, 2013, this image shows a composite “stacked” image of comet ISON. These five stacked images of 10 seconds each were taken with the 20″ Marshall Space Flight Center telescope in New Mexico. This technique allows the comet’s sweeping tail to emerge with more detail.
Image credit: NASA/MSFC/MEO/Cameron McCarty