Comet ISON is 3 days to perihelion.
On Nov. 18-19, two comets (ISON and Encke) are going to fly by the planet Mercury in quick succession. NASA’s MESSENGER spacecraft will have a front-row seat for the rare double encounter.
The Hubble Space Telescope has spotted a strange asteroid spewing six comet-like tails of dust.
Stardust-NExT is closing in for a second look of the comet on Feb. 14, 2011.