Rocky planets are common around other stars, but their atmospheric properties remain
largely unconstrained. Thanks to a wealth of recent planet discoveries and upcoming …

We describe how environmental context can help determine whether oxygen (O2) detected
in extrasolar planetary observations is more likely to have a biological source. Here we …

Photochemistry is a fundamental process of planetary atmospheres that regulates the
atmospheric composition and stability. However, no unambiguous photochemical products …

The search for habitable environments and biomarkers in exoplanetary atmospheres is the
holy grail of exoplanet science. The detection of atmospheric signatures of habitable Earth …

Geological evidence shows that ancient Mars had large volumes of liquid water. Models of
past hydrogen escape to space, calibrated with observations of the current escape rate …

We explore how well spectra from the James Webb Space Telescope (JWST) will likely
constrain bulk atmospheric properties of transiting exoplanets. We start by modeling the …

We present an update of the open-source photochemical kinetics code VULCAN to include
C–H–N–O–S networks and photochemistry. The additional new features are advection …

The Wet Chemistry Laboratory on the Phoenix Mars Lander performed aqueous chemical
analyses of martian soil from the polygon-patterned northern plains of the Vastitas Borealis …

Understanding the impact of active M dwarf stars on the atmospheric equilibrium and
surface conditions of a habitable zone Earth-like planet is key to assessing M dwarf planet …

Until recently, infrared observations of exoplanetary atmospheres have typically been
interpreted using models that assumed solar elemental abundances. With the chemical …