Our home galaxy, the Milky Way, makes for a pretty space picture, and it looks normal at a distance. But a new 3D map reveals a surprise: The Milky Way is being warped and twisted by its stars. The Milky Way is a spiral galaxy, in which stars and gas clouds exist mainly in its two spiral "arms." Our massive neighbor, the Andromeda galaxy, is also a spiral. Spiral galaxies usually appear very flat and easy to see through a telescope, said the researchers behind the new map, published Monday in the journal Nature Astronomy. Using 1,339 large, pulsating stars...