Astronomers at the University of Michigan have discovered that the hot gas in the halo of the Milky Way galaxy is spinning in the same direction and at a comparable speed to the galaxy's spiral-shaped disk. Until now, people have assumed that the disk of the Milky Way spins at a high speed, while the enormous reservoir of hot gas in the halo is stationary. But that is wrong -- The hot gas in the halo appears to be rotating almost as fast as the disk.