Protoplanetary disc

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• protoplanetary disc — noun an accretion disc surrounding a T Tauri star; thought to be the progenitor of a planetary system Syn: proplyd …   Wiktionary

• Disc — Contents 1 Data storage 2 Science 2.1 Astronomy 2.2 Biology …   Wikipedia

• Accretion disc — An accretion disc (or accretion disk) is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a central body. The central body is typically either a young star, a protostar, a white dwarf, a neutron star,… …   Wikipedia

• Formation and evolution of the Solar System — Artist s conception of a protoplanetary disk The formation and evolution of the Solar System is estimated to have begun 4.568 billion years ago with the gravitational collapse of a small part of a giant molecular cloud …   Wikipedia

• History of Solar System formation and evolution hypotheses — Capture theory redirects here. For the solar capture theory, see this article s section on Solar System formation. For the lunar capture theory, see this article s section on lunar formation. Ideas concerning the origin and fate of the world date …   Wikipedia

• Solar System — This article is about the Sun and its planetary system. For other systems, see planetary system and star system. For a list of physical and orbital statistics for the Solar System s largest bodies, see List of gravitationally rounded objects of… …   Wikipedia

• T Tauri star — Drawing of a T Tauri star with a circumstellar accretion disc …   Wikipedia

• Planet — This article is about the astronomical object. For other uses, see Planet (disambiguation) …   Wikipedia

• Oort cloud — An artist s rendering of the Oort cloud and the Kuiper belt (inset). Sizes of individual objects have been exaggerated for visibility …   Wikipedia

• Accretion (astrophysics) — In astrophysics, the term accretion is used for at least two distinct processes.The first and most common is the growth of a massive object by gravitationally attracting more matter, typically gaseous matter in an accretion disc. Accretion discs… …   Wikipedia