The La Silla Observatory in Chile, where at least three new exoplanets have been discovered. (Credit: Iztok Boncina/ESO)

There is a triplet of Earth-sized planet candidates orbiting
a star just 12 light-years away, a new study has found. And one appears to be
in the habitable zone.

All three candidates are thought to be at least 1.4 to 1.8
times the mass of Earth, and orbit the star every three to 13 days, which would
put the entire system well within Mercury’s 88 day orbit of the Sun. T