#NASA, #Space, #astronomy, #διάστημα
It is not a terminal explosion, but rather an "imposter" star. Located in the spiral galaxy NGC 4559—about 30 million light-years away—this luminous blue variable (with a mass of ~33 Suns) flares up and fades while remaining intact, which is why it is often mistaken for a supernova.
New data from the Chandra X-ray Observatory has detected the object in X-rays for the first time, revealing the underlying mechanism: a companion star in an elongated orbit triggers these outbursts whenever it draws near. Between 2012 and 2026, 27 such flares were recorded, occurring with a period of approximately 113 days—a behavior not characteristic of supernovae.
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