<p>Astronomers have detected a relatively close exoplanet orbiting in the habitable zone of its star, where temperatures are just right to support liquid water on the surface. As detailed in a new study published in the journal Astronomy &#038; Astrophysics, the planet, dubbed HD 20794 d, is suspected to be what's referred to as a super-Earth, possessing six times the mass of our world. Promisingly, it orbits a star much like our own, and resides just twenty light years away. That makes it one of the closest potentially habitable worlds that astronomers know of. There's still some major questions to […]</p>