White Dwarf Star
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NASA
White Dwarf Star (Artist’s Concept)
A smaller white dwarf star (left) pulls material from a larger star into a swirling accretion disk in this artist’s concept released Nov. 19, 2025, to illustrate the first use of NASA’s IXPE (Imaging X-ray Polarization Explorer) to study a white dwarf star. IXPE spent nearly one week focused on EX Hydrae, a white dwarf star system located in the…
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NASA
NASA’s IXPE Measures White Dwarf Star for First Time
By Michael Allen For the first time, scientists have used NASA’s IXPE (Imaging X-ray Polarization Explorer) to study a white dwarf star. Using IXPE’s unique X-ray polarization capability, astronomers examined a star called the intermediate polar EX Hydrae, unlocking the geometry of energetic binary systems. In 2024, IXPE spent nearly one week focused on EX Hydrae, a white dwarf star…
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NASA
NASA’s Hubble Uncovers Rare White Dwarf Merger Remnant
An international team of astronomers has discovered a cosmic rarity: an ultra-massive white dwarf star resulting from a white dwarf merging with another star, rather than through the evolution of a single star. This discovery, made by NASA’s Hubble Space Telescope’s sensitive ultraviolet observations, suggests these rare white dwarfs may be more common than previously suspected. “It’s a discovery that underlines…
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NASA
NASA Missions Spy First Possible ‘Survivor’ Planet Hugging White Dwarf Star
An international team of astronomers using NASA’s Transiting Exoplanet Survey Satellite (TESS) and retired Spitzer Space Telescope has reported what may be the first intact planet found closely orbiting a white dwarf, the dense leftover of a Sun-like star, only 40% larger than Earth. The Jupiter-size object, called WD 1856 b, is about seven times larger than the white dwarf, named WD 1856+534. It circles…
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