Extrasolar Planets: May 2015

From the numerous detected planets outside the Solar system, no terrestrial planet comparable to our Earth has been discovered so far.

Locating planets in HabitableZones (HZs) around other stars is a growing field in contemporary astronomy.

Young terrestrial planets, when they are still embedded in a circumstellar disk, accumulate an atmosphere of nebula gas.

We present the thermal evolution and emergent spectra of solidifying terrestrial planets along with the formation of steam atmospheres.

The water ice or snow line is one of the key properties of protoplanetary disks that determines the water content of terrestrial planets in the habitable zone.

Priorities in exo-planet research are rapidly moving from finding planets to characterizing their physical properties. Of key importance is their chemical composition, which feeds back into our understanding of planet formation.

Understanding the surface and atmospheric conditions of Earth-size, rocky planets in the habitable zones (HZs) of low-mass stars is currently one of the greatest astronomical endeavors.

Considerable progress has been made in recent years in observations of atmospheric signatures of giant exoplanets, but processes in rocky exoplanets remain largely unknown due to major challenges in observing small planets.