Despite the generally hostile nature of the environments involved, chemistry does occur in
space. Molecules are seen in environments that span a wide range of physical and chemical …

The concentration and distribution of water in the Earth has influenced its evolution
throughout its history. Even at the trace levels contained in the planet's deep interior (mantle …

Presented here are the observations and interpretations from a comprehensive analysis of
16 representative particles returned from the C-type asteroid Ryugu by the Hayabusa2 …

Volatile and organic-rich C-type asteroids may have been one of the main sources of Earth's
water. Our best insight into their chemistry is currently provided by carbonaceous chondritic …

Comets are considered to be some of the most pristine and unprocessed Solar system
objects accessible to in situ exploration. Investigating their molecular and elemental …

Cometary nuclei contain the least modified material from the formative epoch of our
planetary system, and their compositions reflect a range of processes experienced by …

Aerogels are highly porous structures prepared via a sol‐gel process and supercritical
drying technology. Among the classes of aerogels, silica aerogel exhibits the most …

All planetary materials sampled thus far vary in their relative abundance of the major isotope
of oxygen, 16O, such that it has not been possible to define a primordial solar system …

The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the
Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains …

Organics found in comet 81P/Wild 2 samples show a heterogeneous and unequilibrated
distribution in abundance and composition. Some organics are similar, but not identical, to …