NASA Finds Hidden Companion May Explain Giant Star's 27 Eruptions

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Astronomers may have solved the mystery of AT 2016blu, a massive star that has produced at least 27 supernova-like eruptions over 15 years yet has not been destroyed. NASA's Chandra X-ray Observatory detected strong X-ray emissions suggesting a hidden companion, which could be a black hole or neutron star. Researchers think this companion periodically pulls in material from the unstable star, setting off intense bursts of light. The finding may also help explain ultra-luminous X-ray sources and how stars evolve.

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