Mysteriously Perfect Sphere Spotted in Space by Astronomers

Our Milky Way galaxy is home to some extremely weird things, but a new discovery has astronomers truly baffled. In data collected by a powerful radio telescope, astronomers have found what appears to be a perfectly spherical bubble. We know more or less what it is – it's the ball of expanding material ejected by an exploding star, a supernova remnant – but how it came to be is more of a puzzle. A large international team led by astrophysicist