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 …

This chapter explores how physical properties of cometary dust (size distribution,
composition, and grain structure) can be obtained from characteristics of the electromagnetic …

Polarimetric observations of the light scattered by dust in cometary comae have been carried
out at Pic-du-Midi Observatory and at Haute-Provence Observatory (France) between 1990 …

ABSTRACT Comet 67P/Churyumov–Gerasimenko (67P) become observable for the first
time in 2021 since the Rosetta rendezvous in 2014–2016. Here, we present pre-perihelion …

Abstract Analysis of the polarization of light scattered by cometary particles reveals
similarities amongst the phase curves, together with some clear differences: i) comets with a …

Comet C/1995 O1 (Hale-Bopp) has been observed over a large range of phase angles (7°–
47°) by the imaging polarimetric method from June 1996 to April 1997. Polarization maps …

During the last century, the presence of icy particles throughout the universe has been
confirmed by numerous ground and space based observations. Ultrathin icy layers are …

The cosmological constant is the most economical candidate for dark energy. No other
approach really alleviates the difficulties faced by the cosmological constant because, in all …

Context. Remote observations of the light scattered by comet 67P/Churyumov-Gerasimenko
dust coma are of major importance for determining the physical properties of the particles …

Comets are low-density, kilometer-sized bodies of ices (mostly H 2 O, CO 2, and CO) and
dust (silicates, carbon, and organics), which orbit the Sun along elongated orbits. Cometary …