HomeAstronomyUltracool dwarf stars orbit each other in less than a day

Ultracool dwarf stars orbit each other in less than a day

Scientists have discovered a record-breaking binary star system consisting of two ultracool dwarf stars so close to each other that they complete an orbit in under a day. 

The stars are separated by just around 1.5 million miles, about 1% the distance between the Earth and the sun, which means a year for these stars lasts just 17 hours. This makes the star system the tightest ultracool dwarf binary ever found.

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