NASA SPACECRAFT HURTLES TOWARD ACTIVE COMET HARTLEY 2

A NASA spacecraft plans to image the active comet nucleus oF Comet Hartley 2 during a 435 mile-long flyby on November 4th. This will be the 5th comet to have a close-up image taken of it's nucleus. Comet Hartley 2 is unusually fizzy or offgassy and the gas it emits is greenish in space due to presence of cyanide. This will be our first close encounter the most active and greenish comet yet.

http://science.nasa.gov/science-news/science-at-nasa/2010/15oct_epoxi/

http://news.discovery.com/space/comet-hartley-2-pumps-out-the-cyanide.html