CometISONcouldwellbethebrightestandmostspectacularcometforageneration.ItshouldappearabovetheeasternhorizonfromDecember2013asagloriousstreakacrossthesky.ISONhasbeentravellingtowardsthesunfortenthousandyearsandwillmakeonlyoneorbitthroughitscoronabeforedisappearingoffintotheoutersolarsystem. Butaswellasprovidingagreat..bbb
应昊茗,梁缘,魏峰,洪爽,唐振超,杨萍,丁博,郑红