An international team of astronomers using the NASA/ESA Hubble Space Telescope have discovered a stellar rarity: an ultra-massive white dwarf that formed when a white dwarf merged with another star, rather than through the evolution of a single star. This discovery, which was made possible by Hubble’s sensitive ultraviolet observations, suggests that these rare white dwarfs may be more common than previously suspected.
The release, images and videos are available on:
https://esahubble.org/news/heic2510/
Kind regards,
ESA/Hubble Information Centre
13 August 2025
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