There's a large cluster of stars that are orbiting the center of our galaxy. And by measuring the motion of stars, and in particular, their orbits, we can figure out whether or not there's a central black hole.
Related Keywords: Black Galaxy Motion Figure Out Hole Black Hole
Related Authors: Leonardo da Vinci Stephen Hawking Isaac Newton Galileo Galilei Rene Descartes Nicolaus Copernicus Omar Khayyam
