Motivated by the diversity of circumstellar planets in binary stars and the strong effects of the secular resonances of Jupiter and Saturn on the formation and architecture of the inner […]
Terrestrial Planet
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Venus
The Mass Of The Exo-Venus Gliese 12 b, As Revealed By HARPS-N, ESPRESSO, And CARMENES
Small temperate planets are prime targets for exoplanet studies due to their possible similarities with the rocky planets in the Solar System.
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Impact events, Lava / magma ocean / Volcanic Worlds, Mars, Mercury, Press Release, Venus
Notable Progress In Understanding The Evolution Of The Terrestrial Planets
An SwRI-led team compared the early impact history of Venus and Earth, determining that Venus experienced higher-energy impacts that created a superheated core. Models show these conditions could create Venus’ […]
Posted inAstrogeology, Exoplanets, -moons, -comets, Impact events, Status Report
Semi-analytical Model For The Dynamical Evolution Of Planetary Systems via Giant Impacts
In the standard model of terrestrial planet formation, planets are formed through giant impacts of planetary embryos after the dispersal of the protoplanetary gas disc.
Posted inAstrogeology, Atmospheres, Climate, Weather, Imaging & Spectroscopy, Lava / magma ocean / Volcanic Worlds, Mapping, Geodesy, Cartography, Bathymetry, Missions & Hardware, Press Release, Venus
Lava World Recon: Possible Tectonic Activity On Venus
Using archival data from the mission, launched in 1989, researchers have uncovered new evidence that tectonic activity may be deforming the planet’s surface.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, PLATO, Press Release
Cameras Installed On Terrestrial Planet Hunter Plato
The activities to assemble the European Space Agency’s Plato mission are progressing well now that 24 of the spacecraft’s 26 cameras have been installed. Once in space, Plato will use […]
Posted inAstrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Exoplanets, -moons, -comets, Habitable Zones, Interstellar, Status Report
Habitable Worlds Formed at Cosmic Dawn
Primordial supernovae were the first, great nucleosynthetic engines in the Universe, forging the elements required for the later formation of planets and life.
Posted inAstronomy & Telescopes, Beta Pictoris, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Dynamics of the Beta Pictoris Planetary System and Possibility of an Additional Planet
The Beta Pictoris system is characterized by a dusty debris disk, in addition to the presence of two already known planets. This makes it a particularly interesting case for studying […]
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Status Report
The CO-Fuelled Time Machine: Tracing Birth Conditions and Terrestrial Planet Formation Outcomes in HD 163296 through Pebble Drift-induced CO Enhancements
The architecture and composition of planetary systems are thought to be strongly influenced by the transport and delivery of dust and volatiles via ices on pebbles during the planet formation […]
![The GCE-corrected, differential elemental abundance relative to the Sun ([X/Fe]solar - [X/Fe]star). The five solar twins with -0.1 < [Fe/H] < 0.1 dex, ∆ Teff < 100 K, ∆ log g < 0.1 are TOI-1055, TOI-2426, TOI-744, TOI-755, and TOI-818, are shown as gray symbols in the background, while the colored symbols show the average elemental abundance for these stars. Refractory elements are shown in orange, volatile elements are shown in blue symbols. Elements with Tc above 1300 K are considered refractory, with the threshold Tc of 1300 K shown by a dashed orange line. We fit a linear regression to the colored symbols while considering the error bars. The orange line displays the best linear fit to all the colored points, with the shaded blue band indicating the 1-σ confidence interval. The expression for the linear regression is -6.726e-05+2.320e−05 −2.342e−05 × Tc (K) + 0.086+0.030 −0.030. -- astro-ph.SR](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/11/High-Precision-Stellar-Chemical-Abundance.png?resize=1200%2C719&ssl=1)
Posted inAstrochemistry, Astronomy & Telescopes, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography
High Precision Stellar Chemical Abundance for 17 Planet-hosting Stars and the Condensation Temperature Trend
The Sun is depleted in refractory elements compared to nearby solar twins, which may be linked to the formation of giant or terrestrial planets.