“ISON Lives!!!” “ISON R.I.P…” Those are just some of the possible headlines that we’ve wrestled with this week, as Comet C/2012 S1 ISON approaches perihelion tomorrow evening. It’s been a rollercoaster ride of a week, and this sungrazing comet promises to keep us guessing right up until the very end. Comet ISON reaches perihelion on … Continue reading "ISON Watch: A Post-Perihelion Viewing Guide"