Space Science
XRISM solves famous star’s 50-year mystery
Mar 24, 2026, 8:00 AM
出典: ESA Space News
<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>
Details
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.
Related Knowledge
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X-ray Astronomy
X-ray astronomy is a branch of astronomy that studies celestial objects emitting X-rays. These high-energy emissions can provide insights into extreme environments, such as those found around black holes and neutron stars.
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White Dwarfs
White dwarfs are the remnants of stars that have exhausted their nuclear fuel and collapsed. They are typically very dense and hot, and they emit light primarily due to residual thermal energy rather than ongoing nuclear fusion.