Nature Astronomy via PubMed Archives

NanoSIMS ratio and ion images (top images) of a region containing a 17O-rich presolar silicate grain (arrows). The elemental maps and spectra from SEM-EDX analysis confirm the grain is a ferromagnesian silicate. -- Nature Astronomy via PubMed

Astrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Comets and Asteroids, Imaging & Spectroscopy, Meteorites & Asteroids, Missions & Hardware, Sample Return, Status Report

The Variety And Origin Of Materials Accreted By Bennu’s Parent Asteroid

by Keith CowingDecember 24, 2025December 24, 2025

The first bodies to form in the Solar System acquired their materials from stars, the presolar molecular cloud and the protoplanetary disk.

Earth-mass planet orbiting a sun-like star -- NASA

Astrochemistry, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report

Earth-mass Planets With He Atmospheres In The Habitable Zone Of Sun-like Stars

by Keith CowingAugust 11, 2025August 11, 2025

The discovery of many low-mass exoplanets, including several planets within the habitable zone of their host stars, has led to the question of which kind of atmosphere surrounds them.

Nature Astronomy via PubMed

The Variety And Origin Of Materials Accreted By Bennu’s Parent Asteroid

Earth-mass Planets With He Atmospheres In The Habitable Zone Of Sun-like Stars

Re-evaluating Boundary Conditions Of The Concept of Life

An Interesting Crater In Valles Marineris

A Stellar Envelope Near The Black Hole Sgr A* Contains Water

What Can Planetary Ice Shells Teach Us about Ocean Mixing and Life, and Why Salt Matters

Multi-epoch Ultraviolet Observables For Breaking The Radius-albedo Degeneracy In Directly Imaged Exoplanets