The chemical composition of cometary ices provides clues for the conditions of formation
and evolution of the early Solar System. A large number of molecules have been identified …

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 …

The D/H ratio in cometary water has been shown to vary between 1 and 3 times the Earth's
oceans value, in both Oort cloud comets and Jupiter-family comets originating from the …

We collect observational evidence that supports the scheme of mass transfer on the nucleus
of comet 67P/Churyumov–Gerasimenko. The obliquity of the rotation axis of 67P causes …

We present the discovery of a transiting exoplanet candidate in the K2 Field-1 with an orbital
period of 9.1457 hr: K2-22b. The highly variable transit depths, ranging from∼ 0% to 1.3 …

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 …

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 …

Aims. We derive for the first time the size-frequency distribution of boulders on a comet,
67P/Churyumov-Gerasimenko (67P), computed from the images taken by the …

When comet nuclei approach the Sun, the increasing energy flux through the surface layers
leads to sublimation of the underlying ices and subsequent outgassing that promotes the …

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 …