Since Protostars and Planets VI (PPVI), our knowledge of the global properties of
protoplanetary and debris disks, as well as of young stars, has dramatically improved. At the …

Star and planet formation are the complex outcomes of gravitational collapse and angular
momentum transport mediated by protostellar and protoplanetary disks. In this review, we …

We review current understanding of star formation, outlining an overall theoretical framework
and the observations that motivate it. A conception of star formation has emerged in which …

" The study of planet formation has a long history. The idea that the Solar System formed
from a rotating disk of gas and dust-the Nebula Hypothesis-dates back to the writings of …

Binary and multiple star systems are a frequent outcome of the star formation process, and
as a result almost half of all stars with masses similar to that of the Sun have at least one …

Protoplanetary disks are quasi-steady structures whose evolution and dispersal determine
the environment for planet formation. I review the theory of protoplanetary disk evolution and …

Episodic accretion has become a recent focus of attention in the star-and planet-formation
community, turning into a central topic to understand the evolution of protostars and …

We use multiscale smoothed particle hydrodynamic simulations to study the inflow of gas
from galactic scales (∼ 10 kpc) down to≲ 0.1 pc, at which point the gas begins to resemble …

The origin and properties of the initial black hole seeds that grow to produce the observed
population of accreting sources remain to be determined. It is a challenge to uniquely …

In this paper, we discuss the evolution of gravitationally unstable pre-galactic discs that
result from the collapse of haloes at high redshift z≈ 10 or so, which have not yet been …