XRISM finally solves famous star’s 50-year space mystery
A star visible to the naked eye has held a secret for more than half a century. Gamma Cassiopeiae, a bright star in the constellation Cassiopeia, has puzzled astronomers since the 1970s with its unusually intense X ray emissions. [1] Now, researchers using the X Ray Imaging and Spectroscopy Mission, a joint space observatory developed […]