A comet not seen since Neanderthals walked the Earth is set to make a return trip - and astronomers have shared the first detailed image of the 'cosmic snowball.' 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.... ....The comet is currently 117 million miles from Earth and is set to reach the sun on January 1, loop around and make its closest approach to our planet. And E3 will be the first comet seen to the naked eye since...