The mechanism of dust emission from a cometary nucleus is still an open question and
thermophysical models have problems reproducing outgassing and dust productions rates …

ABSTRACT The Aswan cliff on Comet 67P/Churyumov–Gerasimenko collapsed on 2015
July 10. Thereby, relatively pristine comet material from a depth of was exposed at the …

Planetesimals in the primordial disc may have experienced a collisional cascade. If so, the
comet nuclei later placed in the Kuiper belt, scattered disc, and Oort Cloud would primarily …

Cliff collapses on Comet 67P/Churyumov–Gerasimenko expose relatively pristine nucleus
matter and offer rare opportunities to characterize ice-rich comet material. Here, Microwave …

Particle–particle and particle–gas processes significantly impact planetary precursors such
as dust aggregates and planetesimals. We investigate gas permeability () in 12 granular …

Context. One of the primary goals of the European Space Agency's Rosetta mission to comet
67P/Churyumov-Gerasimenko was to investigate the mechanisms responsible for cometary …

Our aim is to characterize patterns of evolution of morphological units on the nucleus of 67P-
CG such as pits, sink-holes or, more generally, pit-like features. This work focuses on …

Large and deep depressions, also known as pits, are observed at the surface of all Jupiter-
family comets (JFCs) imaged by spacecraft missions. They offer the opportunity to glimpse …

Deriving properties of cometary nuclei from coma data is of significant importance for our
understanding of cometary activity and has implications beyond. Groundbased data …

This chapter addresses the current knowledge of the internal properties of comet nuclei. We
discuss observations and methods to access these characteristics, together with processes …