Researchers Find First Potentially Habitable Exoplanet

摘要

An Earth-size planet has been spotted orbiting a nearby star at a distance that would make it not too hot and not too cold - comfortable enough for life to exist, researchers announced Sept. 29.rnIf confirmed, the exoplanet, named Gliese 581g, would be the first Earth-like world found residing in a star's habitable zone - a region where a planet's tempera-ture could sustain liquid water on its surface.