Gliese 581

Common card · No. 401869

Gliese 581 () is a red dwarf star of spectral type M3V which hosts a planetary system, 20.5 light-years (6.3 parsecs) away from Earth in the constellation Libra. Its estimated mass is about a third of that of the Sun, and it is the 101st closest known star system to the Sun. Gliese 581 is one of the oldest, least active M dwarfs known. Its low stellar activity improves the likelihood of its three planets retaining significant atmospheres, and lessens the sterilizing impact of stellar flares.

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