MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Habitable alien planet. Computer artwork of two moons seen over the limb of an Earth-like alien planet with oceans and clouds. A planet's orbit and its size have to fit within a narrow range for it to have a surface temperature suitable for liquid water, and for it to retain an atmosphere.
Model release not required. Property release not required.