Chondritic meteorites (chondrites) contain evidence for the interaction of liquid water with
the interiors of small bodies early in Solar System history. Here we review the processes …

We report primordial aqueous alteration signatures in water-soluble organic molecules from
the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 spacecraft of JAXA. Newly …

Abstract The Uranian moon Ariel exhibits a diversity of geologically young landforms, with a
surface composition rich in CO 2 ice. The origin of CO 2 and other species, however …

Water activity recorded in asteroids offers a perspective on their habitability. Aqueous
alteration, namely the interaction of liquid water with minerals, occurred in the parent body of …

Aqueous alteration in planetesimals is one of the earliest geological processes in the solar
system. The timing of aqueous alteration sheds light on the timescale of material evolution …

The surface chemistry of pyrrhotites from intact particles directly collected from asteroid
(162173) Ryugu was investigated by micro-Raman spectroscopy. The Raman peak …

Returned samples from the carbonaceous asteroid (162173) Ryugu provide pristine
information on the original aqueous alteration history of the Solar System. Secondary …

Oxygen 3‐isotope ratios of magnetite and carbonates in aqueously altered carbonaceous
chondrites provide important clues to understanding the evolution of the fluid in the …

In order to gain insights on the conditions of aqueous alteration on asteroid Ryugu and the
origin of water in the outer solar system, we developed the measurement of water content in …

Samples collected from the surface/subsurface of C-type asteroid 162,173 Ryugu by the
Hayabusa2 mission were nondestructively analyzed in three dimensions (3D). Seventy …