SMRTR Science & EngineeringAug 7, 2025Science Daily

Hubble just exposed a rare and violent star collision

SMRTR summary

Hubble Space Telescope's ultraviolet observations have revealed that nearby white dwarf WD 0525+526 is likely the result of two stars colliding, not the collapse of a single massive star. This "ultra-massive" white dwarf, weighing 20% more than our Sun, shows small amounts of carbon in its atmosphere and unusually thin hydrogen and helium layers—key evidence of a stellar merger occurring at an earlier evolutionary stage than previously observed examples.

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