Recently in the Habitable Zones & Global Climate Category

The carbon-silicate cycle regulates the atmospheric CO2 content of terrestrial planets on geological timescales through a balance between the rates of CO2 volcanic outgassing and planetary intake from rock weathering.

Surface liquid water is essential for standard planetary habitability.

During a live Google Hangout, three astrophysicists -- Zachory Berta-Thompson, Bruce Macintosh and Marie-Eve Naud -- discussed the huge variety of planets discovered so far, how close we are to being able to see other Earth-like planets, and all that remains unknown.

Identifying the source of Earth's water is central to understanding the origins of life-fostering environments and to assessing the prevalence of such environments in space.

Water On Earth Is Older Than Our Sun

A pioneering new study has shown that water found on Earth predates the formation of the Sun -- raising hopes that life could exist on exoplanets, the planets orbiting other stars in our galaxy.

Clear Skies and Water Vapor on an Exoplanet

Astronomers using data from three of NASA's space telescopes -- Hubble, Spitzer and Kepler -- have discovered clear skies and steamy water vapor on a gaseous planet outside our solar system.

The detection and atmospheric characterization of super-Earths is one of the major frontiers of exoplanetary science. Currently, extensive efforts are underway to detect molecules, particularly H2O, in super-Earth atmospheres.

Spectroscopic observations of exoplanets are crucial to infer the composition and properties of their atmospheres. HD 189733b is one of the most extensively studied exoplanets and is a corner stone for hot Jupiter models.

A team of scientists led by Carnegie's Jacqueline Faherty has discovered the first evidence of water ice clouds on an object outside of our own Solar System.

Several circumbinary planets have recently been discovered. The orbit of a planet around a binary stellar system poses several dynamic constraints.