Closest Earth-size Alien Planet Found, May Be a Venus Twin

A newly discovered planet 39 light-years away is being called the closest Earth-size exoplanet ever discovered — and a potential "Venus twin" — providing the mouth-watering opportunity for a close-up look at the environment on a rocky alien world. One of the dire frustrations of studying planets around other stars (and, really, any astronomical object) is their distance from Earth, which makes it onerous or impossible to get many basic details about them. Exoplanets are dou