Editor’s note: according to NASA: “With its all-sky survey of the position, brightness and motion of over one billion stars in our Milky Way galaxy, Gaia will provide a large […]
Stellar Cartography
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release, Stellar Cartography
Tatooine-Class Planet Discovered Orbiting Two Suns
There’s so little we know about circumbinary planets – planets that orbit two stars instead of one – that they can feel like the stuff of fantasy.
Posted inAstronomy & Telescopes, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography
Characterizing Six Seismic Solar Analogs Observed By Kepler, K2, And HERMES
Solar analogs, stars that closely match the fundamental properties of the Sun, provide key benchmarks for testing stellar structure and evolution across different ages and activity levels.
Posted inExoplanets, -moons, -comets, Press Release, Stellar Cartography
New Findings About Exoplanets Challenge Theories Of Planet Formation
Astronomers estimate there is at least one planet for every star in our galaxy. Called exoplanets, they orbit stars outside our solar system. But new research from McMaster University reveals […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release, Space Weather & Heliophysics, Stellar Cartography
Asteroseismic Modelling Of Main-sequence Solar-like Stars And Kepler Exoplanet Host Stars With The FICO Procedure I. Catalogue Of Fundamental Stellar Properties
We present detailed asteroseismic modelling of 95 main-sequence solar-like stars and Kepler exoplanet host stars using the FICO procedure, a three-step method that combines forward and inverse techniques that enables […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Press Release, Stellar Cartography
The Most Common Planets In The Galaxy Don’t Appear Around The Most Common Stars
Astronomers now estimate there is at least one planet for every star in our galaxy. These worlds, called exoplanets, are planets that orbit stars outside our solar system. But new […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
The POKEMON Speckle Survey of Nearby M dwarfs. IV. Distance-Limited Catalog (POKEMON-DLC)
The Solar Neighborhood is dominated by stars smaller, colder, and fainter than the Sun: the M dwarfs.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release, Space Weather & Heliophysics
A Theoretical Study of the Structure and Elemental Abundances of HD 20794
HD-20794 is a nearby, bright, metal-poor G-type dwarf hosting a compact planetary system, including a super-Earth near the habitable zone.
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Press Release, Stellar Cartography
Most Close Pairs of Stars Are Born as Cosmic Twins
A new study of infant stars in the Perseus and Orion star-forming regions suggests that most close pairs of stars are born as twins in the same disk, rather than […]
![[TOP] Time evolution of H2 mixing ratio for an atmosphere with 100% H2O. The heatmaps display vertical profiles over the 360-day simulation duration, with pressure (in bars) on the y-axis and time (in days) on the x-axis. The upper row shows results from the YMDF and FF models, while the bottom row corresponds to the FF 400 K and the CF model, as indicated on the panels. [BOTTOM] Heatmaps of CH4 mixing ratio in the atmosphere with 1% H2O over the 360-day simulation period for an atmosphere containing 100% water vapour analogous to the previous Fig. 8 -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/04/Stellar-Flare-driven-Evolution.png?resize=1200%2C718&ssl=1)
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography
Stellar Flare-driven Evolution Of Primordial Early Exo-Earth Atmospheres: Insights From A Young M Dwarf Flare Model
Context. M dwarfs are key targets for terrestrial exoplanet studies, with prospects for atmospheric spectroscopy. However, strong stellar magnetic activity and frequent flaring require modelling efforts to assess their impact […]