Last chance to catch rare comet in Bay Area skies before it vanishes for 80,000 years San Francisco Chronicle‘Once-in-a-lifetime’ comet, super supermoon shine over Philly. How to see them NBC PhiladelphiaPhotos show rare comet streaking across Pennsylvania sky in once-in-a-lifetime moment CBS PittsburghComet Tsuchinshan-ATLAS Arrives from Afar nasa.govThe dazzling Comet Tsuchinshan-ATLAS is emerging in the night sky: How to see it Space.com