In the past few years, several major space missions have been completed (eg, Deep Impact,
LCROSS, Chandrayaan-1, Stardust, Hayabusa), and a number of spacecraft are currently …

The Cassini-Huygens mission to Saturn provided a close-up study of the gas giant planet, as
well as its rings, moons, and magnetosphere. The Cassini spacecraft arrived at Saturn in …

We explore the past evolution of Saturn's moons using direct numerical integrations. We find
that the past Tethys–Dione 3: 2 orbital resonance predicted in standard models likely did not …

Saturn's rings consist of a huge number of water ice particles, with a tiny addition of rocky
material. They form a flat disk, as the result of an interplay of angular momentum …

We propose a solution to the problem of accretion disc sizes in active galactic nuclei being
larger when measured by reverberation map** than predicted by theory. Considering the …

The origin of Saturn's rings has not been adequately explained. The current rings are more
than 90 to 95 per cent water ice, which implies that initially they were almost pure ice …

A growing number of young white dwarfs (WDs) with metal-enriched atmospheres are
accompanied by excess infrared (IR) emission, indicating that they are encircled by a …

It was recently proposed that metal-rich white dwarfs (WDs) accrete their metals from
compact discs of debris found to exist around more than a dozen of them. At the same time …

Recent discoveries of compact (sizes≲ R☉) debris disks around more than a dozen metal-
rich white dwarfs (WDs) suggest that pollution of these stars with metals may be caused by …

Plato envisioned Earth's building blocks as cubes, a shape rarely found in nature. The solar
system is littered, however, with distorted polyhedra—shards of rock and ice produced by …