Green Comet Makes an Appearance for the First Time in 50,000 Years
An asteroid swung by South America recently to say hello; and not long after, another space object has paid Earth a visit. Comet C/2022 E3 (ZTF) is a green comet that last visited our solar system 50,000 years ago. It was only discovered in March 2022, when it was spotted by the Zwicky Transient Facility (ZTF). Given its long orbit, we're unlikely to ever see it again in our lifetimes.