Scientists have used NASA’s IXPE (Imaging X-ray Polarisation Explorer) to study a white dwarf star for the first time. By measuring the polarisation of X-rays, the mission allowed astronomers to investigate the structure of a highly energetic binary star system known as EX Hydrae. The observations revealed new details about how matter behaves in extreme environments where gravity and magnetism collide. IXPE observed EX Hydrae for nearly a full week in 2024. The system is located in the constellation Hydra, about 200 light-years from Earth.

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