Astronomers have solved a 50-year cosmic mystery: gamma-Cas X-rays are caused by a hidden white dwarf feeding off the bright star. The breakthrough used XRISM space mission observations.
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Astronomers finally solve the gamma-Cas X-ray mystery after 50 years
50 Years years Mystery age
Hidden White Dwarf X-ray source
XRISM Space Mission Detection method
Material Accretion Heating Phenomenon
Since 1970s discovery timeline