Astronomers have long searched for life within a rather narrow ring around a star, the “habitable zone,” where a planet should be neither too hot nor too cold for liquid […]
M-dwarf
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Characterization Of Two New Transiting Sub-Neptunes And A Terrestrial Planet Around M-dwarf Hosts
We report the confirmation of three transiting exoplanets orbiting TOI-1243 (LSPM~J0902+7138), TOI-4529 (G~2–21), and TOI-5388 (Wolf~346) that were initially detected by TESS through ground-based photometry and radial velocity follow-up measurements […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Two Temperate Earth- and Neptune-sized Planets Orbiting Fully Convective M dwarfs
As the diversity of exoplanets continues to grow, it is important to revisit assumptions about habitability and classical HZ definitions. In this work, we introduce an expanded ‘temperate’ zone, defined […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
The Persistent Thermal Anomalies In Rocky Worlds
Observing the dayside thermal emissions of rocky exoplanets provides essential insights into their compositions and the presence of atmospheres.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Physical Vetting of the Ultra-Short-Period Sub-Earth TOI 864.01
We present a comprehensive analysis of TOI 864.01, a transit-like signal associated with the M-dwarf TIC 231728511.
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Press Release, Radiation, Space Weather & Heliophysics, Stellar Cartography
Naturally Occurring “Space Weather Station” Elucidates New Way To Study Habitability Of Planets Orbiting M Dwarf Stars
How does a star affect the makeup of its planets? And what does this mean for the habitability of distant worlds? Carnegie’s Luke Bouma is exploring a new way to […]
Posted inAstrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Origin & Evolution of Life, Radiation, Space Weather & Heliophysics, Status Report, Terraforming & Geoengineering, TRAPPIST-1
Dearth of Photosynthetically Active Radiation Suggests No Complex Life on Late M-Star Exoplanets
The rise of oxygen in the Earth’s atmosphere during the Great Oxidation Event (GOE) occurred about 2.3 billion years ago. There is considerably greater uncertainty for the origin of oxygenic […]
Posted inExoplanets, -moons, -comets, Radiation, Space Weather & Heliophysics, Status Report, TRAPPIST-1
Molecular Hydrogen Controls The Temperatures Of Flares On TRAPPIST-1
Early JWST observations of TRAPPIST-1 have revealed an unexpected puzzle: energetic white-light flares (E>1030 erg) reach temperatures of only ∼3500–4000,K, nearly three times cooler than typical solar flares, which peak […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release, Radiation, Space Weather & Heliophysics
Habitability Of Exoplanets Orbiting Flaring Stars
As of late 2025 there are about 70 exoplanets that meet the formal criterion of having equilibrium temperatures allowing the presence of liquid water and about 50 of them orbit […]
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report
Multicolour Validation Of Two Temperate Mini-Neptunes Around M-dwarf Habitable Zones
For small planets orbiting within the habitable zones of their host stars, multicolour validation via photometric transit observations offers an efficient alternative to prioritize targets before intensive radial-velocity follow-up, thereby […]