<p>CometISONcouldwellbethebrightestandmostspectacularcometforageneration.ItshouldappearabovetheeasternhorizonfromDecember2013asagloriousstreakacrossthesky.ISONhasbeentravellingtowardsthesunfortenthousandyearsandwillmakeonlyoneorbitthroughitscoronabeforedisappearingoffintotheoutersolarsystem.
Butaswellasprovidingagreat...</p>
