Comet ISON Spotted by Mercury Probe, Sun Observatory Ahead of Thursday Solar Encounter
Monday, November 25, 2013 - 16:00
in Astronomy & Space
NASA's Messenger spacecraft snapped new images of Comet ISON on Nov. 19 as the object sped by Mercury. Meanwhile, a phalanx of sun-studying probes will watch ISON's close encounter with the sun on Thursday (Nov. 28).