Comet Tsuchinshan-ATLAS wows skywatchers around the world and astronauts in space (photos, video) Space.comComet last seen in stone age to make closest approach to Earth The GuardianBright comet Tsuchinshan-ATLAS could be visible without a telescope for the 1st time in 80,000 years. Here's how to see it this week. Livescience.comWatch: 'Comet of a century' puts on beautiful show while zooming by Earth Fox Weather