A Once-in-a-Lifetime Comet Is Dazzling Astronomers

A once-in-a-lifetime comet has been dazzling astronomers recently, and tomorrow morning might be your last best chance to see it. Comet Nishimura, described by the New York Times as a green-glowing “cosmic snowball” full of dust and ice, was first spotted by Japanese photographer Hideo Nishimura about a month ago, but its brightness is now […]