stellar accretion

См. также в других словарях:

• Stellar kinematics — is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful… …   Wikipedia

• Stellar rotation — is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface.The rotation of a star produces an equatorial bulge due to… …   Wikipedia

• accretion disc — noun (astronomy) A flat disc formed by matter in orbit around a celestial body • • • Main Entry: ↑accrescent * * * accretion disk or accretion disc, Astronomy. a disk shaped formation of gases or other interstellar matter around a black hole,… …   Useful english dictionary

• Stellar Conquest — is a board game designed by Howard Thompson that has achieved minor cult status since its initial release in 1974. This science fiction game, originally rejected by the Avalon Hill Company in 1973,Fact|date=October 2007 and published the… …   Wikipedia

• Stellar evolution — Life cycle of a Sun like star Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years (for the most… …   Wikipedia

• Stellar birthline — The stellar birthline is a predicted line on the Hertzsprung Russell diagram that relates the colour and luminosity of protostars at the end of the initial phase of accretion onto them. [cite journal | author = Stahler, S.W. | year = 1983 |… …   Wikipedia

• Stellar classification — In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are… …   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

• Stellar black hole — A stellar black hole is a black hole formed by the gravitational collapse of a massive star (20 or more solar masses, though the exact amount of mass needed has not been determined and may depend on many parameters) at the end of its lifetime.… …   Wikipedia

• Differential rotation — is seen when different parts of a rotating object move with different angular velocities (rates of rotation) at different latitudes and/or depths of the body and/or in time. This indicates that the object is not solid. In fluid objects, such as… …   Wikipedia

• Differential rotation in stars — What is differential rotation? *Differential rotation is when a rotating body has different angular velocities at different latitudes and/or depths of the body and/or in time. Differential rotation can be applied to any type of fluid body such as …   Wikipedia