High-energy x-rays can provide a clear picture of the Galactic Center, whereas optical light and low-energy x-rays are blocked by interstellar gas and dust. In this x-ray emission image, white represents the most intense x-ray emission and blue the least intense. The Einstein satellite discovered a network of x-ray emissions consisting of both point sources and diffuse light. The brightest x-ray source is above the west side of the Sagittarius A—not surprising since Sag A is also the bright radio source identified with the galaxy’s center. X-ray emission appears to be quite high in this region, but it is actually rather weak when compared with x-ray levels in the centers of other galaxies. The central x-ray source in the Andromeda Galaxy, for