This review presents our understanding of cometary dust at the end of 2017. For decades,
insight about the dust ejected by nuclei of comets had stemmed from remote observations …

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 …

The Philae lander provides a unique opportunity to investigate the internal structure of a
comet nucleus, providing information about its formation and evolution in the early solar …

The physical properties of cometary nuclei observed today relate to their complex history
and help to constrain their formation and evolution. In this article, we review some of the …

This paper is the result of the International Cometary Workshop, held in Toulouse, France in
April 2014, where the participants came together to assess our knowledge of comets prior to …

We review the complex relationship between the dust-to-gas mass ratio usually estimated in
the material lost by comets, and the refractory-to-ice mass ratio inside the nucleus, which …

The Philae lander accomplished the first soft landing and the first scientific experiments of a
human-made spacecraft on the surface of a comet. Planned, expected and unexpected …

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 …

Our knowledge of the internal structure of asteroids is, so far, indirect–relying entirely on
inferences from remote sensing observations of the surface, and theoretical modeling of …

Understanding the nature of the cometary nucleus remains one of the major problems in
solar system science. Whipple's (1950) icy conglomerate model has been very successful at …