... Our Galaxy, called the Milky Way, is a vast collection of gas, dust and about a half ... other denizens slowly orbit the center of the Galaxy, with our Sun taking about 200 ...
... type of collapsed star) says that the orbits of these black holes will shrink with time, and eventually they will merge ... There are supermassive black holes in the centers of many galaxies, including our own. ...
... stars line up so close that both shadows merge into one would only happen twice an ... that if one planetary system is so close, the Galaxy must be littered with them ... George Lucas got it exactly right: the Galaxy (even one far, far away) may have ...