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Monogem Ring




Monogem Ring
ROSAT X-ray image of the Monogem Ring
A superbubble, discovered in the soft X-ray energy band by ROSAT, that lies about 1,000 light-years away in the consetllations Monoceros and Gemini. It is believed to be the highly evolved remains of a supernova that took place some 86,000 years. If it shone as brightly in visible light, it would illuminate a region of the night sky about 25° across.


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