Cross-section of the Earth (left) and the exoplanet Kepler-138 d (right). ... These water layers make up more than 50% of its volume, or a depth of about 2000 km. The Earth, ...

This is a cross-section of Earth's ozone layer as measured by the limb profiler, part of the Ozone Mapper Profiler Suite that's aboard the Suomi NPP satellite.

An artist's rendition of a cross-section of Earth. The innermost layer, the inner core, is a 1,500-mile-wide ball of iron. CHRISTOPH BURGSTEDT / SCIENCE PHOTO LIBRARY via Getty Images ...

A cross-section of the Earth reveals three concentric layers. Around the outside, a thin, hard crust ranging from 10 to 100 kilometers thick. Under that, a donut-shaped mantle 2,900 kilometers thick.

A cross section of Earth. Our planet consists of several layers: a solid inner core, a liquid outer core, the mantle, and finally, the crust. forplayday/Getty ...