7 Earth-size worlds found orbiting star; could hold life

For the first time ever, astronomers have discovered seven Earth-size planets orbiting a nearby star — and these new worlds could hold life.This cluster of planets is less than 40 light-years away in the constellation Aquarius, according to NASA and the Belgian-led research team who announced the discovery Wednesday.The planets circle tightly around a dim dwarf star called Trappist-1, barely the size of Jupiter. Three are in the so-called habitable zone, where liquid water and, possibly li