The blobs in this false color image of Andromeda are actually x-ray sources. More than 100 such sources have been found in Andromeda; some lie in huge, ancient globular clusters containing as many as 1 million stars. Other sources include AndromedaΓÇÖs central bulge, spiral arms, and several bright visible objects. X-ray light from AndromedaΓÇÖs central bulge outshines our galaxyΓÇÖs by a factor of four. And AndromedaΓÇÖs center or nucleus emits a thousand times more x-ray luminosity than ours.
Other peculiar x-ray entities reside in AndromedaΓÇÖs bulge. One strange source pulsates in a 7-second cycle. About one third of the x-ray light in AndromedaΓÇÖs bulge comes not from bloblike
