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Gargantuan Flare -From Proxima Centauri Sun's Nearest Neighbor

Gargantuan Flare -From Proxima Centauri Sun's Nearest Neighbor
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A Bright Flare from Star Proxima Centauri

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 (orbits where the surface temperatures can support liquid water). Unfortunately for the prospects of life, however, these stars also exhibit higher levels of stellar activity and flaring than do more massive, solar-type stars, and flares can gradually deplete a planet’s atmosphere of molecules needed for life. Moreover, these hostile conditions persist in some fashion throughout ....

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Gargantuan Flare from Sun's Nearest Neighbor

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 red dwarf stars have lifetimes of tens of billions of years, while the smallest have lifetimes of trillions of years. By comparison, the universe is only 13.8 billion years old. These dim red dwarfs will be the last stars shining in the universe. Astrobiologists are intrigued by the possibility of an ancient technological civilization billions of years old on red-dwarf planets. But th ....

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