An object orbiting a star 1,400 light-years away is seriously confronting our notions of what's possible in the Universe.
That's a 'heavy' isotope of hydrogen; the temperature and pressure required for its fusion are much lower than the temperature and pressure required for the fusion of regular hydrogen that burns in the cores of stars.Brown dwarfs can reach about 80 Jupiter masses in size, and temperatures of aroundWhite dwarfs, on the other hand, are the final stage of life for stars like the Sun.
In the early 2000s, data obtained using the Ultra-Violet-Visual Echelle Spectrograph instrument on thesuggested that WD0032-317 was moving around, tugged around on the spot by an unseen, orbiting companion. Late observations in the near infrared suggested that that companion was a brown dwarf.
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