Discovered by the Zwicky Transient Facility (ZTF) nearly last March, comet C/2022 E3 features a not uncommon bright green glow caused by out-of-this world diatomic carbon (not stable on Earth). What makes E3 rare is that it last appeared 50,000 years ago when Neanderthals still roamed.
Today the comet made its closest approach; but the windchill here in Minnesota will run well below -20 F—way too cold even for an astronomy fan like me. I’m holding out for the 10th of this month when E3 will be close to Mars in the night sky and thus easy to find. However, I may settle for this amazing view provided by Portuguese astrophotographer Michael Claro taken during a spectacular disconnection event when the comet’s tail got torn away by a powerful gust of solar wind.