tidally-locked terrestrial planet Archives

Zonally and temporally averaged snow fraction for our reference non-impacted model (top left) and at three points in time post-impact for our combined water and heat deposition impact model: 6 months post-impact (top right), 1 year post-impact (bottom left), and 15 years post-impact (bottom right), by which time the impacted models snow fraction has returned to a state clost to that found in our non-impacted reference state. -- astro-ph.EP

Atmospheres, Climate, Weather, Comets and Asteroids, Exoplanets, -moons, -comets, Extinction events, Icy Worlds, Impact events

The Impact of Icy Cometary ‘Impacts’ on Exoplanetary Atmospheres I: Tidally-Locked Terrestrial Exoplanets

by Keith CowingSeptember 18, 2024

Impacts by rocky and icy bodies are thought to have played a key role in shaping the composition of solar system objects, including the Earth’s habitability. Hence, it is likely […]

The condensation sequence for a solar composition atmosphere where dashed lines indicate the condensation curves for a variety of typically assumed condensable species. The model planet atmosphere day (red) and night (blue) temperature profiles are shown. In the case of a primordial solar composition atmosphere there may exist a favorable region of temperature phase space where we do not expect significant opacity from condensational clouds (at ∼ 400 - 800 K). However, given the presumed diversity of terrestrial atmospheres, such a favorable region may be unlikely to exist. -- astro-ph.EP

Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Status Report, TRAPPIST-1

Nightside Clouds on Tidally-locked Terrestrial Planets Mimic Atmosphere-Free Scenarios

by Keith CowingSeptember 13, 2024September 13, 2024

We investigate the impact of nightside cloud formation on the observable night-day contrast of tidally-locked terrestrial planet atmospheres.

tidally-locked terrestrial planet

The Impact of Icy Cometary ‘Impacts’ on Exoplanetary Atmospheres I: Tidally-Locked Terrestrial Exoplanets

Nightside Clouds on Tidally-locked Terrestrial Planets Mimic Atmosphere-Free Scenarios

Rethinking The Origin Of Life At Seafloor Hydrothermal Vents

Proto-Biosignatures and Planetary Geochemical Metabolism: A Thermodynamic Screening Model of Prebiotic Geochemical Organization

Cultivation Of Halophilic Archaea In Shallow Subsurface Martian Conditions Has Implications For Extant Life On Mars

Roman Space Telescope Leaves Earth

Atmospheric Retrieval of Combined JWST, HST, and Ground-Based Observations Reveals a Featureless Transmission Spectrum for GJ 1132 b