Number 8 (Story #3), November 12, 1990 by Phillip F. Schewe and Ben Stein
IS THERE A BLACK HOLE AT THE CENTER OF THE MILKY WAY? Studies remain inconclusive. Observations in the infrared indicate a great clustering of stars within the central parsec (3.3 light years) but no tangible evidence for a black hole. At gamma-ray wavelengths radiation is weak and the observed sources are not coincident with the center. At radio wavelengths, Sagittarius A*, which does sit within the central parsec, seems to be a weak version of the cores of active galaxies and appears to be stationary with respect to surrounding objects, implying a great mass. Recent measurements of certain radio-emitting objects within the galaxy's central arcsecond suggest that they are related to Sgr A*, which makes Sgr A*, if not yet a black hole, more interesting as an object of study. (Nature November 1.)
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