LP 890-9 c Archives

Evolution of LP 890-9’s HZ for 10% of the 1000 trials. The pale blue curves correspond to the “early Mars” limit, dark blue to “maximum greenhouse,” orange to “runaway greenhouse” and red to “recent Venus” (Kopparapu et al. 2013). Thin curves represent individual trials, while the thick line is the average. The current orbits of planets b and c, assuming the best fit stellar mass, are shown with dashed black lines. -- astro-ph.EP

Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Water/Hycean Worlds & Oceanography

History and Habitability of the LP 890-9 Planetary System

by Keith CowingDecember 5, 2024

We present numerous aspects of the evolution of the LP 890-9 (SPECULOOS-2/TOI-4306) planetary system, focusing on the likelihood that planet c can support life.

Stellar irradiation comparison for the four inner planets of the Solar System (upper panel) and the LP 890-9 planetary system (lower panel), with scaled planetary radii. The Venus Zone (yellow shade) (Kane et al. 2014) and HZ (blue shade) transition gradually due to the complex climate feedback that may push planets into Earth-like or Venus-like states within the orbital range. HZ limit (solid blue) shown: inner empirical ‘Recent Venus’; and outer ‘Maximum Greenhouse’ limit. A ‘Runaway Greenhouse’ flux limit is also indicated following 1D (black dashed) (Kopparapu et al. 2014) and 3D (black dotted) climate modelling (Kopparapu et al. 2017).

Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Extinction events, Habitable Zones, Press Release, Venus

Venus Atmosphere In 3D Prepares Future Observations Of Rocky Exoplanets

by Keith CowingJune 15, 2023June 15, 2023

The Venus atmosphere may be used as a natural laboratory to understand the evolution of Earth-like planets, according to a study led by the Instituto de Astrofísica e Ciências do […]

LP 890-9 c

History and Habitability of the LP 890-9 Planetary System

Venus Atmosphere In 3D Prepares Future Observations Of Rocky Exoplanets

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