Before about 500 million years ago, most probably our planet experienced temporary snowball conditions, with continental and sea ices covering a large fraction of its surface. This points to a […]
habitabiility
Posted inHabitable Zones, Press Release
Detecting and Characterizing Water Vapor in the Atmospheres of Earth Analogs through Observation of the 0.94 Micron Feature in Reflected Light
The characterization of rocky, Earth-like planets is an important goal for future large ground- and space-based telescopes. In support of developing an efficient observational strategy, we have applied Bayesian statistical […]
Posted inHabitable Zones, Press Release
Disequilibria From Dead To Living Worlds
Chemical disequilibrium in exoplanetary atmospheres (detectable with remote spectroscopy) can indicate life. The modern Earth’s atmosphere-ocean system has a much larger chemical disequilibrium than other solar system planets with atmospheres […]
Posted inHabitable Zones, Press Release
Habitability and Spectroscopic Observability of Warm M-dwarf Exoplanets Evaluated with a 3D Chemistry-Climate Model
Planets residing in circumstellar habitable zones (CHZs) offer our best opportunities to test hypotheses of life’s potential pervasiveness and complexity. Constraining the precise boundaries of habitability and its observational discriminants […]
Posted inHabitable Zones, Press Release
Predicting the Extreme Ultraviolet Radiation Environment of Exoplanets Around Low-Mass Stars: GJ 832, GJ 176, GJ 436
Correct estimates of stellar extreme ultraviolet (EUV; 100 – 1170 Å) flux are important for studying the photochemistry and stability of exoplanet atmospheres, as EUV radiation ionizes hydrogen and contributes […]
Posted inHabitable Zones, Press Release
Simultaneous Optical Transmission Spectroscopy of a Terrestrial, Habitable-Zone Exoplanet with Two Ground-Based Multi-Object Spectrographs
Investigating the atmospheres of rocky exoplanets is key to performing comparative planetology between such worlds and the terrestrial planets that reside in the inner Solar System. Terrestrial exoplanet atmospheres exhibit […]
Posted inHabitable Zones, Press Release
Water Vapor in The Atmosphere Of The Habitable-zone Eight Earth-mass Planet K2-18 b
In the past decade, observations from space and ground have found H2O to be the most abundant molecular species, after hydrogen, in the atmospheres of hot, gaseous, extrasolar planets. Being […]
Posted inHabitable Zones, Press Release
Solar system Chaos and the Paleocene-Eocene Boundary Age Constrained by Geology and Astronomy
Astronomical calculations reveal the solar system’s dynamical evolution, including its chaoticity, and represent the backbone of cyclostratigraphy and astrochronology. An absolute, fully calibrated astronomical time scale has hitherto been hampered […]
Posted inHabitable Zones, Press Release
Geoscience for Understanding Habitability in the Solar System and Beyond
This paper reviews habitability conditions for a terrestrial planet from the point of view of geosciences. It addresses how interactions between the interior of a planet or a moon and […]
Posted inHabitable Zones
The Impact of Stripped Cores On The Frequency Of Earth-size Planets In The Habitable Zone
The frequency of Earth-size planets in the habitable zone of Sun-like stars, hereafter η⊕, is a key parameter to evaluate the yield of nearby Earth analogues that can be detected […]