stellar age Archives

Rocky planet density and composition depends on the age of the host star. The mass and radius of small planets, colour-coded by age, alongside composition tracks from Zeng et al. (2016). The upper, light orange line corresponds to a planet with composition of 100% MgSiO3, i.e. 100% rocky mantle. The middle, dark orange line corresponds to a planet with 67.5% MgSiO3, and 32.5% Fe, providing an analogue for Earth-like composition. The lower blue line represents planets which would be composed of 100% Fe, essentially pure iron cores. -- astro-ph.EP

Astrochemistry, Astrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Status Report

A Link Between Rocky Exoplanet Composition And Stellar Age

by Keith CowingNovember 27, 2024November 27, 2024

Interior compositions are key for our understanding of Earth-like exoplanets. The composition of the core can influence the presence of a magnetic dynamo and the strength of gravity on the […]

stellar age

A Link Between Rocky Exoplanet Composition And Stellar Age

The Emergence Of Life In The Light Of Evolution

ReactionAtlas: Ab Origine Exploration Of Chemical Reaction Networks With Machine Learning

Mass Constraints For The K2-223 System Planets: An Ultra-short-period sub-Earth, A Short-period Super-Earth, And A Tentative Long-period Giant Planet

Double Gravity-Assist Rendezvous Trajectory to Halley’s Comet Using Deep-Space Low Thrust

Photometric Characterization Of Near-Earth Asteroids: Rotation, Taxonomy, And Candidate Evidence For Internal Cohesion