How “The Crab” Became A Unit Of Measurement And Why It Might Disappear
Ever heard of the Crab? No, not that one. And no, not that one, either. The Crab is a unit of measurement used by astronomers. Most space-based telescopes rely on it! But it might be going out of style. It’s all thanks to the Crab Nebula, one of the brightest things in the sky (well,…