The Ultraviolet/Optical Telescope Aboard NASA's Swift Imaged Comet ISON (IMAGE)

NASA/Goddard Space Flight Center

The Ultraviolet/Optical Telescope Aboard NASA's Swift Imaged Comet ISON

Caption

The Ultraviolet/Optical Telescope aboard NASA's Swift imaged comet ISON (center) on Jan. 30, when it was located about 3.3 degrees from the bright star Castor in the constellation Gemini. At the time of this 5.5-minute optical exposure, ISON was about 5,000 times fainter than the limit of human vision.

Credit

Credit: NASA/Swift/D. Bodewits, UMCP

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