Dr David Charbonneaua and Dr Courtney Dressing, astronomers with the Harvard-Smithsonian Center for Astrophysics, suggest that about 6 percent of red dwarf stars have habitable, Earth-sized planets. The closest potentially habitable exoplanet could be just 13 light-years away. This image shows a hypothetical habitable planet with two moons orbiting a red dwarf star (David A. Aguilar) “We thought we would have to search vast distances to find...