Unresolved stellar companions can cause both under-estimations in the radii of transiting planets and over-estimations of their detectability, affecting our ability to reliably measure planet occurrence rates.
Stellar Cartography
Posted inAstrochemistry, Interstellar, Radiation, Space Weather & Heliophysics, Status Report, Stellar Cartography
Increased And Varied Radiation During The Sun’s Encounters With Cold Clouds In The Last 10 Million Years
Recent research raises the possibility that 3 and 7 million years ago, the Sun encountered massive clouds that shrank the heliosphere–the solar cocoon protecting our solar system–exposing Earth to its […]
Posted inAriel Mission, Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Missions & Hardware, Status Report, Stellar Cartography
The Origins Of Planets For ArieL (OPAL) Key Science Project: The End-to-end Planet Formation Campaign For The ESA Space Mission Ariel
The growing body of atmospheric observations of exoplanets from space and ground-based facilities showcases how the great diversity of the planetary population is not limited to their physical properties but […]
Posted inExoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Observational Signatures of Planetary Tidal Disruption Events Around Solar-Mass Stars
The tidal disruption of planets by their host stars represents a growing area of interest in transient astronomy, offering insights into the final stages of planetary system evolution.
Posted inComets and Asteroids, Exoplanets, -moons, -comets, Nomenclature, Systematics, Natural History, Status Report, Stellar Cartography
A Nomenclature For Individual Exocomets
With recent observational advancements, exocomet studies have entered a new era: we have moved from an epoch where exocomets’ signatures were analysed to identify their true nature to a new […]
![Probability distribution functions (PDFs) for the chemical abundances used to sample the stellar properties in our dataset,with lighter colors indicating higher probability densities. Left panel: PDF of [C/Fe] versus [Fe/H]. Right panel: PDF of [α/Fe] versus [Fe/H]. In both panels, the pink contours show the abundance distributions of halo stars from the APOGEE survey, as provided by the astroNN catalog. APOGEE does not reach the lowest metallicities present in our simulated dataset, which explains the differences at low [Fe/H]. -- astro-ph.SR](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/01/Towards-Model-free.png?resize=1200%2C723&ssl=1)
Posted inAI - Data - Apps - Cybernetics, Astrochemistry, Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report, Stellar Cartography
Towards Model-free Stellar Chemical Abundances. Potential Applications In The Search For Chemically Peculiar Stars In Large Spectroscopic Surveys
Chemical abundance determinations from stellar spectra are challenged by observational noise, limitations in stellar models, and departures from simplifying assumptions.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia Mission, Imaging & Spectroscopy, Status Report, Stellar Cartography
Exoplanet Atmospheres And Demographics In The 2040s
Direct observations of exoplanets probe the demographics and atmospheric composition of young self-luminous companions, yielding insight into their formation and early evolution history.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report, Stellar Cartography
Paving the Road to the Habitable Worlds Observatory with High-Resolution Imaging I: New and Archival Speckle Observations of Potential HWO Target Stars
One of the key goals of the Habitable Worlds Observatory (HWO) is to directly image about 25 potentially habitable exoplanets and determine their properties.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release, Stellar Cartography
The MUSCLES Extension for Atmospheric Transmission Spectroscopy: Spectral energy distributions For 20 Exoplanet Host Stars That JWST Observed in Cycle 1
Correctly interpreting JWST spectra of close-in exoplanets requires a measurement of the X-ray and ultraviolet light that the planets receive from their host stars. Here we provide spectral energy distributions […]
Posted inAstrobiology (general), Astronomy & Telescopes, Biophysics, Press Release, Stellar Cartography
Naturally Occurring Network Structures At Vastly Different Scales
Editor’s note: Astrobiology has links to and from everything NASA does. I wish NASA would think outside the box when highlighting this topic – and use the word for this […]