Comet ISON's Moment of Truth

Today is make-or-break time for Comet ISON as it reaches perihelion, the point closest to the sun. At 1:25PM EST the comet will zoom just 730,000 miles above the solar surface, traveling at a speed of about 225,000 miles per hour. You can track the comet's progress live here. What happens during that passage will determine a lot about what the comet will look like in the next few weeks. Will it be a faint smear or a bright fuzzball with a long, lingering tail? Will it fizzle entirely? We are