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Virtual Reality Madness
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ngc7331.txt
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1992-10-13
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246b
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NGC7331 is a spiral galaxy believed to be
very similar to our own in appearance. It
has a mass close to 150 billion suns, and
a luminosity 50 billion suns. In 1959 a
supernova was spotted in one of the arms,
which reached a magnitude of 12.7.