- protoplanetary disk
- допланетный диск, протопланетный диск
English-russian dictionary of physics. 2013.
protoplanetary disk
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Protoplanetary disk — A protoplanetary disk (or proplyd) is a rotating circumstellar disk of dense gas surrounding a young newly formed star, a T Tauri star or Herbig star. The protoplanetary disk may be considered an accretion disk because gaseous material may be… … Wikipedia
Protoplanetary nebula — A protoplanetary nebula or preplanetary nebula Harv|Sahai|Sánchez Contreras|Morris|2005 (PPN) is an astronomical object which is at the short lived episode during a star s rapid stellar evolution between the late asymptotic giant branch (LAGB)Ref … Wikipedia
Debris disk — Hubble Space Telescope observation of the debris ring around Fomalhaut. The inner edge of the disk may have been shaped by the orbit of Fomalhaut b, at lower right. A debris disk is a circumstellar disk of dust and debris in orbit around a star.… … Wikipedia
Circumstellar disk — A circumstellar disk is a torus, pancake or ring shaped accumulation of matter composed of gas, dust, planetesimals, asteroids or collision fragments in orbit around a star. Around the youngest stars, they are the reservoirs of material out of… … Wikipedia
Nebular hypothesis — Star formation Interstellar medium Molecular cloud … 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
Planet — This article is about the astronomical object. For other uses, see Planet (disambiguation) … Wikipedia
TW Hydrae — Starbox short name = TW Hydrae epoch = J2000.0 constell = Hydra ra = RA|11|01|52 dec = DEC| 34|42|17 appmag v = 11.1 absmag v = dist ly = 176.245 dist pc = 54 ± 5 spectral = K8V names = GSC 07208 00347, HIP 53911 Simbad = TW+HyaTW Hydrae is an… … Wikipedia
History of the Earth — For the history of modern humans, see History of the world. Geological time put in a diagram called a geological clock, showing the relative lengths of the eons of the Earth s history The history of the Earth describes the most important events… … Wikipedia
HD 141569 — Starbox short name = HD 141569 epoch = J2000.0 equinox = J2000.0 constell = Libra ra = RA|15|49|57.75 dec = DEC| 03|55|16.4 appmag v = 7.11 absmag v = dist ly = 320 dist pc = 98 class = B9.5Ve names = GSC 05026 00042, HIP 77542, SAO 140789 Simbad … Wikipedia
Planetary migration — occurs when a planet or other stellar satellite interacts with a disk of gas or planetesimals, resulting in the alteration of the satellite s orbital parameters, especially its semi major axis. The generally accepted theory of planet formation… … Wikipedia
