Quick ISON Update: Dimmed but Still Rocking

A quick update on Comet ISON: It brightened quite a bit last night, and then started dimming. It's still going strong, but it's unclear exactly what's happening to the comet itself. Here's a shot taken by the SOHO satellite that shows ISON as of Thursday, Nov. 28 at 15:34 UTC (10:34 EST): As you can see it's still pretty bright, but it was far brighter a few hours earlier. Remember, comets are rocks, gravel, and dust held together by ice. When the ice warms, it turns into a gas, creating the fuz...