Editor’s note: The Parker Solar Probe recently conducted a close fly-by of a star – our sun. This is the closest that any human object has ever gotten to any […]
TRAPPIST-1
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography, TRAPPIST-1
Long-term Stability and Dynamical Spacing of Compact Planetary Systems
Exoplanet detection surveys revealed the existence of numerous multi-planetary systems packed close to their stability limit.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, TRAPPIST-1
Combined Analysis of the 12.8 and 15 μm JWST/MIRI Eclipse Observations of TRAPPIST-1 b
The first JWST/MIRI photometric observations of TRAPPIST-1 b allowed for the detection of the thermal emission of the planet at 15 μm, suggesting that the planet could be a bare […]
![Outgassed atmospheric composition at model termination for HD 63433 d (top) and TRAPPIST-1 c (bottom), versus mantle 𝑓 O2 (x-axis), simulated with both atmosphere models (y-axis). Pie chars show volatile volume mixing ratios and white numbers show log10 total surface pressure [bar]. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/12/Convective-Shutdown-In-The-Atmospheres.png?resize=1200%2C720&ssl=1)
Posted inAstrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Lava / magma ocean / Volcanic Worlds, Status Report, TRAPPIST-1
Convective Shutdown In The Atmospheres of Lava Worlds
Atmospheric energy transport is central to the cooling of primordial magma oceans. Theoretical studies of atmospheres on lava planets have assumed that convection is the only process involved in setting […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release, TRAPPIST-1
The Light Of TRAPPIST-1 b Reveals New Insights On The Planet’s Nature
New TRAPPIST-1 observations with JWST underscore the complexities of confirming a planet’s atmosphere using only broadband thermal emission data. This insight takes on added significance with the newly approved “Rocky […]
Posted inAstrogeology, Astronomy & Telescopes, Comets and Asteroids, Exoplanets, -moons, -comets, Extinction events, Imaging & Spectroscopy, Impact events, Meteorites & Asteroids, Press Release, TRAPPIST-1
The Smallest Asteroids Ever Detected In The Main Belt
The asteroid that extinguished the dinosaurs is estimated to have been about 10 kilometers across. That’s about as wide as Brooklyn. Such a massive impactor is predicted to hit Earth […]
Posted inAstrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, TRAPPIST-1
Novel Physics of Escaping Secondary Atmospheres May Shape the Cosmic Shoreline
Recent James Webb Space Telescope observations of cool, rocky exoplanets reveal a probable lack of thick atmospheres, suggesting prevalent escape of the secondary atmospheres formed after losing primordial hydrogen.
Posted inAstrogeology, Exoplanets, -moons, -comets, Status Report, TRAPPIST-1
Forming Earth-like and Low-Mass Rocky Exoplanets Through Pebble and Planetesimal Accretion
The theory of pebble accretion (PA) has become a popular planet formation theory during the past decade. However, PA studies generally rely on large planetary embryos, much larger than those […]
Posted inAstrogeology, Exoplanets, -moons, -comets, Proxima Centauri, Status Report, TRAPPIST-1
Migration Of Bodies In The Proxima Centauri and Trappist 1 Planetary Systems
The motion of planetesimals was studied in the Proxima Centauri and TRAPPIST 1 exoplanetary systems.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Proxima Centauri, Radiation, Space Weather & Heliophysics, Status Report, TRAPPIST-1
Magnetic Interaction of Stellar Coronal Mass Ejections with Close-in Exoplanets: Implication on Planetary Mass Loss and Ly-α Transits
Coronal Mass Ejections (CMEs) erupting from the host star are expected to have effects on the atmospheric erosion processes of the orbiting planets. For planets with a magnetosphere, the embedded […]