XRISM solves famous star’s 50-year mystery
<img src="https://www.esa.int/var/esa/storage/images/esa_multimedia/images/2026/03/gamma-cas_and_its_hungry_white_dwarf_companion/27166121-1-eng-GB/Gamma-Cas_and_its_hungry_white_dwarf_companion_card_full.jpg" alt="Gamma-Cas and its hungry white dwarf companion"> <p>An invisible companion consuming material from the naked-eye star gamma-Cas has been revealed as the culprit for curious X-rays coming from the stellar system. This closes the case on a mystery that has puzzled astronomers for more than fifty years. </p>
- Published
- Mar 24, 2026, 8:00 AM
- Source
- ESA Space News