Latest astronomy nouvelles

TRAPPIST-1 c receives almost the same bolometric flux as Venus. However JWST measurements show no sign of CO2 which is abundant in the atmosphere of our neighboring planet. According to a new study stellar winds cannot account for all the lost CO2. So astronomers believe that the planet was either born without significant CO2 atmosphere, or must have lost big portion of it through the escape of hydrogen. ...

WASP-77Ab likely formed in a disk with few planetesimals and underwent disk-free migration, starting within the CO ice line and ending beyond the water ice line...

The exoplanet joins a growing census of aligned warm Jupiters around single stars....

HD 88986 b has the longest orbital period among known transiting planets with known mass and less than 4 Earth radii....

This is the first time these has been detected on a planet with a temperature below 1000 K...

The primary star is known to have 2 rocky exoplanets near radius valley which separates super-Earths and sub-Neptunes...

Its high eccentricity may be the result of past violent scattering events ...

Gas giant Kepler-1658 b is slowly spiraling inward due to tidal interactions with its host star. The observed rate of orbital decay cannot be explained by tidal dissipation in the star alone, but it can be explained if the planet rotates non-synchronously...

Researchers have used ground-based photometry and spectra to study the unocculted starspots on the young star AU Mic. They find that AU Mic has at least two spectral components: a 4000 K ambient photosphere and cool spots that have a temperature of 3000 K and cover 39% of the surface. They also detect a third flux component, which they attribute to flare flux. This study will help us better understand the starspot coverage on AU Mic and other sta...