![Log–log relation between age and rotation period for M dwarfs. Black squares show the Engle & Guinan (2023) sample. Filled circles are cluster members from Curtis et al. (2020) and Godoy-Rivera et al. (2021), colour-coded by spectral type (M2–M6). The solid blue curve is the median fit. Dark- and light-grey bands denote the 68% and 95% posterior predictive regions, including intrinsic astrophysical scatter. Triangles with error bars indicate the target stars analysed in this work. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Stellar.png?resize=1200%2C720&ssl=1)
[astro-ph.EP] Measuring M dwarf ages is a central challenge in stellar astrophysics. These stars evolve so slowly that isochrone fitting gives little constraint, requiring alternative methods based on rotation, activity, […]
TOI-270
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Possible Evidence For The Presence Of Volatiles On The Warm Super-Earth TOI-270 b
The search for atmospheres on rocky exoplanets is a crucial step in understanding the processes driving atmosphere formation, retention, and loss.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
JWST COMPASS: NIRSpec/G395H Transmission Observations of TOI-776 c, a 2 Rearth [Earth radius] M Dwarf Planet
The atmospheres of planets between the size of Earth and Neptune at short orbital periods have been under intense scrutiny.
Posted inAstrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Icy Worlds, Status Report, Water/Hycean Worlds & Oceanography
Planets Contain More Water Than Previously Thought
Most of a planet’s water is generally not found on the surface, but is hidden deep inside. This affects the potential habitability of distant worlds, as model calculations by researchers […]