Stellar flares may hamper search for life in promising star system
[ad_1] Illustration of TRAPPIST-1, a red-dwarf star with at least seven orbiting planets Mark Garlick/Alamy The search for atmospheres around the TRAPPIST-1 star system, one of the most promising locations for life elsewhere in the galaxy, might be even more difficult than astronomers first thought because of short-lived radiation blasts from the star. TRAPPIST-1, first discovered in 2016, is a small red dwarf star about 40 light years from Earth with at least seven planets orbiting it. It is a prime target for astronomers hoping to detect extraterrestrial life because several of its planets appear to sit in a habitable zone where temperatures are just right for liquid water. But in order to support life, those planets would have to retain atmospheres. So far, extensive observations with the James Webb Space Telescope have failed to find evidence of atmospheres on any of the planets. Now, Julien de Wit at the Massachusetts Institute of Technology and his colleagues have detected microflares coming from the TRAPPIST-1 star every hour or so that last for several minutes. These …