FHV100020SArtist's concept of a protoplanetary disk.
RMR100020SSome galaxies have powerfully active cores that emit jets of energy.
RMR100044SA giant black hole at the center of a galaxy.
FSU100001SArtist's concept of Cygnus X-1, a luminous x-ray source in the constellation Cygnus.
FSU100009SA compact object, or a black hole, is seen ripping off gas from its' sun-like companion.