Massive flare erupts from tiny, ultra-cool star, boosting its brightness by 10,000-fold. Located 250 light-years away, the small star is barely larger than a brown dwarf, yet the flare was 10 times more powerful than the Sun's strongest known flare.

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Massive flare erupts from tiny, ultra-cool star, boosting its brightness by 10,000-fold. Located 250 light-years away, the small star is barely larger than a brown dwarf, yet the flare was 10 times more powerful than the Sun's strongest known flare.