Caught speeding: Clocking the fastest-spinning brown dwarfs April 7th 2021, 2:29 pm More massive than most planets but not quite heavy enough to ignite like stars, brown dwarfs are cosmic in-betweeners Image Credit: Email Using data from NASA’s Spitzer Space Telescope, scientists have identified the three fastest-spinning brown dwarfs ever found. More massive than most planets but not quite heavy enough to ignite like stars, brown dwarfs are cosmic in-betweeners. And though they aren’t as well known as stars and planets to most people, they are thought to number in the billions in our galaxy. In a study appearing in the