This review examines our current understanding of the possible birth environments of our
Solar System. Because most stars form within groups and clusters, the question becomes …

We review the role of stellar flybys and encounters in shaping planet-forming discs around
young stars, based on the published literature on this topic in the last 30 years. Since most …

This paper studies the dynamical evolution of young groups/clusters, with N= 100-1000
members, from their embedded stage out to ages of~ 10 Myr. We use N-body simulations to …

Debris belts on the periphery of planetary systems, encompassing the region occupied by
planetary orbits, are massive analogues of the Solar system's Kuiper belt. They are detected …

Most of the observed extrasolar planets are found on tight and often eccentric orbits. The
high eccentricities are not easily explained by planet-formation models, which predict that …

Abstract The Scattered Disk Objects (SDOs) are a population of trans-Neptunian bodies with
semimajor axes 50< a≲ 1000 au and perihelion distances q≳ 30 au. The detached SDOs …

We describe calculations for the formation of icy planets and debris disks at 30-150 AU
around 1-3 M⊙ stars. Debris disk formation coincides with the formation of planetary …

We study planetary migration in a gas-free disk of planetesimals. In the case of our Solar
System we show that Neptune could have had either a damped migration, limited to a few …

Explaining the origin of the orbits of 2000 CR 105 (a= 230 AU, q= 44 AU) and 2003 VB 12
(a= 531 AU, q= 74 AU, unofficially known as Sedna) is a major test for our understanding of …

We present the results of an imaging survey of protoplanetary disks around single T Tauri
stars in Taurus. Thermal emission at 2 mm from dust in the disks has been imaged with a …