Submission + - Angry Red Dwarfs May Scorch Alien Life
Hugh Pickens writes: "BBC reports that a study of 210,000 red dwarfs — the most common type of star in our galaxy comprising roughly 75 percent of all the stars in the Milky Way — has found that solar flares are surprisingly frequent unleashing streams of particles that could play havoc with planets' atmospheres — destroying the protective ozone layer, so while the number of exoplanets is rising rapidly, with an implicit hope of finding planets with conditions suitable for life, many questions remain about the very long-term habitability that the Earth has enjoyed. Solar flares unleash bright flashes of light along with streams of charged particles like high-energy protons that can react with atmospheres to destroy ozone, making a planet that had an atmosphere susceptible to strong ultraviolet rays that are known to damage DNA. "Such powerful flares bode ill for any possible biology, life, on any planet that happens to be close to that flaring star," says exoplanet expert Geoff Marcy. "It's extraordinary to think that the most numerous stars, the smallest ones in our galaxy, pose this threat to life.""