Protoplanetary disk - Wikipedia
A protoplanetary disk is a rotating circumstellar disc of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star. The protoplanetary disk may not be considered an accretion disk , while the two are similar.
The structures of protoplanetary disks - AIP Publishing
2021年8月1日 · Planetary systems are assembled in the disks of gas and solid particles that orbit young stars. Those disks are byproducts of angular-momentum conservation during star formation, and they are created when a rotating condensation …
NASA’s Webb Findings Support Long-Proposed Process of Planet …
2023年11月8日 · Theories have long proposed that icy pebbles forming in the cold, outer regions of protoplanetary disks — the same area where comets originate in our solar system — should be the fundamental seeds of planet formation.
Protoplanetary Disk - Harvard University
2004年10月20日 · Protoplanetary Disk. The pressure at the center of the star gradually increases until eventually it balances the gravitational force causing the gas cloud to collapse onto the star. This is called hydrostatic equilibrium.
Protoplanetary Disk - NASA Science
2021年4月14日 · Protoplanetary Disk. This visualization shows the evolution of a young, isolated protoplanetary disk over 16,000 years, including the start of planetary formation.
Protoplanetary Disk - SpringerLink
2023年1月1日 · A protoplanetary disk is a flattened, rotating structure surrounding a young star, out of which planets form. They are composed of gas and dust, with temperatures ranging from over a thousand Kelvin close to the star to a few tens of Kelvin further away, and they emit from infrared to millimeter wavelengths.
Planetesimal rings as the cause of the Solar System’s planetary ...
2021年12月30日 · Here we show that our Solar System may have formed from rings of planetesimals—created by pressure bumps—rather than a continuous disk.
Protoplanetary Disk - SpringerLink
Protoplanetary disks are the birth sites of planets, and are commonly found around newly formed stars. The Sun was likely surrounded by a protoplanetary disk shortly after its formation, and the planets, asteroids, and comets we observe today are the remainders of this disk.
Observations of Protoplanetary Disk Structures | Annual Reviews
The disks that orbit young stars are the essential conduits and reservoirs of material for star and planet formation. Their structures, meaning the spatial variations of the disk physical conditions, reflect the underlying mechanisms that drive those formation processes.
Protoplanetary Disk - an overview | ScienceDirect Topics
A protoplanetary disk is defined as a cradle where new planets form, characterized by vast differences in temperature, density, and irradiation, driving unique chemistry and the formation of molecules essential for planetary evolution.