If these brown dwarfs spun much faster they'd tear themselves apart

Astronomers have found three brown dwarfs — objects more massive than planets but less so than stars — that are the most rapidly rotating of any known. These beasts spin so dizzyingly fast they rotate about once per hour.

That's phenomenal. Think of it this way: They are about the same size as Jupiter, but that giant planet in our solar system spins once every ten hours. These objects spin ten times faster.

Or how about this: Standing on Earth's equator you'd experience a sideways velocity due...