C/2022 E3 (ZTF) is set to pass by Earth for the first time since Neanderthals existed 50,000 years ago. Excitement among sky-watchers is building as a comet, not visible since the time of the Neanderthals, is heading towards Earth again. Formally known as C/2022 E3 (ZTF), the comet orbits the sun every 50,000 years and is set to make its closest approach to our planet on February 1, 2023. E3 was discovered in March, but scientists recently snapped the first detailed photo revealing its brighter greenish coma and a yellowy dust tail. While the comet is too dim to see...