To reach their conclusion, Chen and her team investigated two globular clusters: Messier 3 (M3), located around 34 thousand light-years from Earth, and the more distant M13, found around 73 light-years away.
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Their research was published in the journal Nature Astronomy. This helps them stay hot and hold back the rate of aging. The international team led by Chen found evidence that cooling white dwarfs in the massive collection of stars belonging to globular cluster Messier 13 (M13), in the Canes Venatici constellation, still burn hydrogen in their outer layers. "This was quite a surprise, as it is at odds with what is commonly believed." Jianxing Chen, a PhD student in the Department of Physics and Astronomy at the Alma Mater Studiorum Università di Bologna and the Italian National Institute for Astrophysics, said in a press release on the new findings: "We have found the first observational evidence that white dwarfs can still undergo stable thermonuclear activity. This research implies that this end could be more protracted than previously believed. Our own star, the Sun, will end its life as a white dwarf.
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James Webb Telescope vs Hubble As NASA's Observatory Steps Closer to Launch.