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GJ 3685A

This very old red dwarf suffered on April 24th 2004 a heavy eruption, when caused by a flare its luminosity increased 10 000 times. This 20 minute lasting flare was a million times stronger than the strongest flares of the Sun. Even for flare stars this is unusual fierce.

Constellation: Leo
Distance: 45 light-years
Spectral class: M4
Visual magnitude: 13.25

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    GJ 3685A
Photos: NASA, JPL, Caltech

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