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x-ray nova

   Also found in: Wikipedia 0.03 sec.
x-ray nova [′eks ‚rā ′nō·və]
(astronomy)
An x-ray source which appears suddenly in the sky, dramatically increases in intensity over a few days, and then decays away with a lifetime of several months. Also known as transient x-ray source.
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Known as GRO J1655-40, this X-ray nova ranked as one of the three brightest X-ray sources in the sky for 2 weeks.
All aglow over an X-ray nova by Science News
X-ray nova debuts in southern sky Astronomers have detected a Milky Way star just as it began a rare and explosive flare-up, emitting an outburst of X-rays and optical light that dramatically boosted its brightness.
X-ray nova debuts in southern sky by Science News
 
 
 
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