helium shell flash

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• Helium flash — A helium flash is the runaway fusion of helium in the core of low mass stars of less than about 2.25 solar masses and greater than about 0.5 solar mass, or on the surface of an accreting white dwarf star. They may also occur in the outer layers… …   Wikipedia

• Asymptotic giant branch — The asymptotic giant branch is the region of the Hertzsprung Russell diagram populated by evolving low to medium mass stars. This is a period of stellar evolution undertaken by all low to intermediate mass stars (0.6 10 solar masses) late in… …   Wikipedia

• V605 Aquilae — Constelación Aquila Ascensión recta α 19h 18min 20,5s Declinación δ +01º 47’ 00’’ Distancia …   Wikipedia Español

• Переменная типа R Северной Короны — Кривая блеска R Северной короны, прототипа звёзд типа R Северной короны AAVSO Переменные типа R Северной короны (R Coronae Borealis, сокращенно RCB или R CrB) является эруптивными переменными звездами, которые изменяют свою светимость в двух… …   Википедия

• 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

• Triple-alpha process — The triple alpha process is a set of nuclear fusion reactions by which three helium nuclei (alpha particles) are transformed into carbon.cite book|author=Editors Appenzeller, Harwit, Kippenhahn, Strittmatter, Trimble| title= Astrophysics Library… …   Wikipedia

• Oxygen-burning process — The oxygen burning process is a set of nuclear fusion reactions that take place in massive stars that have used up the lighter elements in their cores. It occurs at temperatures around 1.5×109 K / 130 keV and densities of 1010 kg/m3. The… …   Wikipedia

• AGB-Stern — Die Entwicklung von Sternen unterschiedlciher Masse im Hertzsprung Russell Diagramm. Der asymptotische Riesenast, abgekürzt als AGB, zeigt einen Stern mit zwei Sonnenmassen. Ein AGB Stern (engl. Asymptotic giant branch) ist ein entwickelter Stern …   Deutsch Wikipedia

• Nova — For other uses, see Nova (disambiguation). Artist s conception of a white dwarf star accreting hydrogen from a larger companion A nova (plural novae) is a cataclysmic nuclear explosion in a star caused by the accretion of hydrogen on to the… …   Wikipedia

• Mira-Stern — Die Mira Sterne sind langperiodische veränderliche Sterne mit großen Amplituden und späten Spektren. Sie sind nach ihrem Prototyp Mira im Sternbild Walfisch (lat. cetus) benannt. Inhaltsverzeichnis 1 Definition 2 Spektrum 3 …   Deutsch 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