Unusual satellite data: A black hole?

Details Unusual satellite data: A black hole? Unusual satellite data: A black hole?

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978stin...7829000.&link_type=abstract

Unknown

Astronomy and Astrophysics

Astronomy

Black Holes (Astronomy), Iue, Space Programs, Spaceborne Astronomy, Spectrum Analysis, Ultraviolet Astronomy, European Space Agency, Giant Stars, Star Clusters, Star Distribution, Ultraviolet Spectra, X Ray Sources

Scientific paper

Data obtained by the NASA-launched European Space Agency's International Ultraviolet Explorer satellite suggests the possibility of a massive black hole at the center of some globular clusters (star groups) in our galaxy. Six of these clusters, three of them X-ray sources, were closely examined. Onboard short wavelength UV instrumentation penetrated the background denseness of the clusters 15,000 light years away where radiation, probably from a group of 10 to 20 bright blue stars orbiting the core, was observed. The stars may well be orbiting a massive black hole the size of 1,000 solar systems. The existence of the black hole is uncertain. The dynamics of the stars must be studied first to determine how they rotate in relation to the center of the million-star cluster. This may better indicate what provides the necessary gravitational pull that holds them in orbit.

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