NASA Discovery Reveals Largest Group of Earth-Size Planets In Habitable Zone

A team of astronomers using NASA’s Spitzer Space Telescope, an orbiting platform that observes the universe exclusively in the InfraRed  region of the spectrum, have announced the unprecedented discovery of a group of Earth-size planets in orbit around the cool, low-mass red dwarf star TRAPPIST-1, three of which lie within the star’s habitable zone! The habitable zone … More NASA Discovery Reveals Largest Group of Earth-Size Planets In Habitable Zone