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Center for Astrophysics A Hubble image of the M-dwarf star Proxima Centauri, our closest stellar neighbor about four light-years away. Proxima hosts two planets, and is known to actively flare. Astronomers studying the suitability for life evolving on exoplanets around M-dwarf stars have completed a multi-wavelength analysis of an extreme flare on Proxima Cen. Hubble/ ESA/NAS The prospects for life around low-mass, cool M-type stars have been extensively discussed because these stars are the most common ones in the galaxy, and they frequently host Earth-sized planets in their habitable zones ...

  A team of astronomers spotted an extreme outburst, or flare, from the Sun’s nearest neighbor–the star Proxima Centauri, a “red dwarf” with about one-eighth the mass of our Sun., Proxima Centauri sits just four light-years, or almost 25 trillion miles, from the center of our Solar System and hosts at least two planets, one of which may look something like Earth. Red dwarfs, also known as M-dwarfs,  are a class of stars that contain the least massive and coolest main-sequence stars in the Milky Way.  They are also hosts to many of the thousands of known exoplanets. The most massive...