Comet last seen in stone age to make closest approach to Earth The GuardianHow to see Comet A3 streak across the sky this month WTOPHow to spot Comet Tsuchinshan-Atlas The Planetary SocietyBright 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