![Elemental [X/Fe] abundances derived in this work as a function of stellar age. The solid orange lines show the best-fit linear age–abundance relations derived in this work, and the dotted grey lines show the corresponding relations from M. Bedell et al. (2018) for comparison. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/The-Sun.png?resize=1200%2C718&ssl=1)
[astro-ph.SR] Recent observational studies have suggested that the Sun may be chemically peculiar relative to the majority of solar twins.
Stellar Cartography
Posted inExoplanets, -moons, -comets
First Completed Rocky Worlds Program Observations Open New Era in Exoplanet Studies
[STScI] Scientists leading the astronomy community’s most ambitious effort to study rocky planets outside of our solar system have reached a major milestone.
Posted inAstronomy & Telescopes
A Scalable Path to Astrometric Exomoon Discoveries with the Nautilus Space Observatory
[astro-ph.IM] Moons orbiting exoplanets (exomoons) can be detected through the reflex motion they impart to their host planet, which is recoverable in relative star-planet astrometric time series.
![Abundance trends of [X/Fe] versus [Fe/H]. The data points have been colour-coded by the estimated ages of the stars. The red and blue lines mark the smoothed running mean for stars that have ages greater than 9.5 Gyr, and less than 9.5 Gyr, respectively. -- astro-ph.GA](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Exploring-the-Milky.png?resize=1200%2C711&ssl=1)
Posted inAstrochemistry
Exploring The Milky Way Stellar Disk. Carbon, Nitrogen, Oxygen, Sulphur, Potassium, and Copper Abundances For 714 F and G dwarf Stars In The Solar Neighbourhood
[astro-ph.GA] We aim to determine abundances of carbon, nitrogen, sulphur, potassium, and copper for 714 nearby F and G dwarf and subgiant stars, and to re-derive oxygen abundances using updated […]
Posted inExoplanets, -moons, -comets
How A Giant Planet Survived Its Star’s Death
[Northwestern University] When astronomers discovered a giant planet orbiting a dead star in 2020, they wondered how it survived its star’s violent demise. Now, observations from NASA’s James Webb Space […]
Posted inExoplanets, -moons, -comets
Demographics Of Planet-forming Disks With The SKAO
[astro-ph.EP] Understanding how solid material in planet-forming disks evolves from micron-sized dust to planetary cores is a central challenge in modern astrophysics. This study has advanced dramatically in the past […]
Posted inExoplanets, -moons, -comets
Free Floating Exoplanets or Merely Detached?
[Astrophysical Journal] Microlensing surveys suggest the presence of a surprisingly large population of free-floating planets, with a rate of about two Neptunes per star.
Posted inAstrogeology, Astronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Revisiting The Exo-Mercury Candidate GJ 367 b With ESPRESSO And A Self-Consistent Tidal Distortion Model
We report revised mass and radius measurements for GJ 367 b, an ultra-short-period (7.7 hr) sub-Earth in a multi-planet system orbiting a nearby (~9 pc) M dwarf host. Previous mass […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
Super-Earths And Mini-Neptunes Follow Different Orbital Period-eccentricity Relations
Many exoplanets have been observed with radius sizes between that of Earth and that of Neptune and are thus classified into two groups: super-earths (SEs) and mini-neptunes (MNs).
Posted inAstronomy & Telescopes, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Missions & Hardware, Press Release, Stellar Cartography
CHEOPS Exoplanet Mission Extended
Following the remarkable scientific achievements of the space telescope CHEOPS, the European Space Agency (ESA) has decided to extend the mission once again.