Posts Tagged ‘Alien’

Comments Off on Earth-Size Planets Come in Two Flavors : Rocky or Gassy

Planets one to four times the size of Earth (at right) could be amenable to life. Earth-size planets circling nearby stars come in two flavors, either rocky or gassy, astronomers reported on Monday. And more than three-quarters of stars likely host at least one of these alien Earths. “Super-Earth” planets can be either rocky like […]