MESSENGER detects comets ISON and Encke, prepares for closer encounters
Thursday, November 14, 2013 - 11:30
in Astronomy & Space
NASA's Mercury-orbiting MESSENGER spacecraft has captured images of two comets—2P/Encke and C/2012 S1 (ISON)—setting the stage for observations later this month when both comets will be substantially brighter and much closer to Mercury and the Sun.