Hera is a planetary defense mission under development in the Space Safety and Security
Program of the European Space Agency for launch in 2024 October. It will rendezvous in …

Questions regarding how primordial or pristine the comets of the solar system are have been
an ongoing controversy. In this review, we describe comets' physical evolution from dust and …

Abstract The Jupiter Trojan asteroids are a key population for understanding the chemical
and dynamical evolution of the Solar System. Surface compositions of Trojans, in turn …

When the OSIRIS-REx spacecraft pressed its sample collection mechanism into the surface
of Bennu, it provided a direct test of the poorly understood near-subsurface physical …

We use a novel approach to model the entire cratering process resulting from impacts on
small, weak asteroids that uses shock physics code calculations directly. We found that …

Ice is known to be a rigid and brittle crystal that fractures when deformed. We demonstrate
that ice grown as single-crystal ice microfibers (IMFs) with diameters ranging from 10 …

The primordial disc of small icy planetesimals, once located at 15–from the Sun, was
disrupted by giant planet migration in the early Solar system. The primordial disc thereby …

Comets evolve due to sublimation of ices embedded inside porous dust, triggering dust
emission (that is, erosion) followed by mass loss, mass redistribution and surface …

Aims. We present the most extensive catalog of exposures of volatiles on the
67P/Churyumov-Gerasimenko nucleus generated from observations acquired with the …

White dwarf (WD) pollution is thought to arise from the tidal disruption of planetary bodies.
The initial fragment stream is extremely eccentric, while observational evidence suggest that …