LIVE NASA Video Chat About Comet ISON

Comet ISON is headed for a very, very hot date with the Sun. At roughly 18:37 UTC today (1:37 p.m. EST) it will be at perihelion, its closest approach to the Sun, broiling away just 1.1 million kilometers (700,000 miles) above the star's surface. [UPDATE (Nov. 28 at 18:20 UTC): I have added a new SOHO image here, taken at 17:24 UTC (12:24 EST). It's a combination of a wide and narrow view, and the nucleus is not nearly as obvious. I don't want to speculate, but it's possible we're seeing that th...