Big, bright, and beautiful, spiral galaxy M83 lies a mere twelve million
light-years away, near the southeastern tip of the very long constellation
Hydra. This deep view of the gorgeous island universe includes observations
from Hubble, along with ground based data from the European Southern
Observatory's very large telescope units, National Astronomical Observatory of
Japan's Subaru telescope, and Australian Astronomical Observatory photographic
data by D. Malin. About 40,000 light-years across, M83 is popularly known as
the Southern Pinwheel for its pronounced spiral arms. But the wealth of reddish
star forming regions found near the edges of the arms' thick dust lanes, also
suggest another popular moniker for M83, the Thousand-Ruby Galaxy. Arcing near
the top of the novel cosmic portrait lies M83's northern stellar tidal stream,
debris from the gravitational disruption of a smaller, merging satellite
galaxy. The faint, elusive star stream was found in the mid 1990s by enhancing
photographic plates.
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