From the frontiers of research on ice dynamics in its broadest sense, this review surveys the
structures of ice, the patterns or morphologies it may assume, and the physical and chemical …

The sublimation and condensation of ices play a very important role in the formation of
planetary systems, in the evolution of some solar system bodies as well as in the equilibrium …

The composition of cometary ices provides key information on the chemical and physical
properties of the outer solar nebula where comets formed, 4.6 Gy ago. This chapter …

Pits have been observed on many cometary nuclei mapped by spacecraft,,,. It has been
argued that cometary pits are a signature of endogenic activity, rather than impact craters …

Comets have three known reservoirs: the roughly spherical Oort Cloud (for long-period
comets), the flattened Kuiper Belt (for ecliptic comets), and, surprisingly, the asteroid belt (for …

We critically review the data on the sizes, shapes, albedos, and colors of cometary nuclei.
Reliable sizes have been determined for 65 ecliptic comets (ECs) and 13 nearly isotropic …

This chapter reviews the estimates of the dust-to-gas and refractory-to-ice mass ratios
derived from Rosetta measurements in the lost materials and the nucleus of 67P/Churyumov …

INTRODUCTION On 1 January 2019, the New Horizons spacecraft passed 3538 km from
Kuiper Belt object (KBO)(486958) Arrokoth. Arrokoth is a contact binary consisting of two …

Abstract The VIRTIS (Visual IR Thermal Imaging Spectrometer) experiment has been one of
the most successful experiments built in Europe for Planetary Exploration. VIRTIS …

Aims. We study the link between gravitational slopes and the surface morphology on the
nucleus of comet 67P/Churyumov-Gerasimenko and provide constraints on the mechanical …