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Stellar classification. In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines.
The Bright Star Catalogue, which is a star catalogue listing all stars of apparent magnitude 6.5 or brighter, or roughly every star visible to the naked eye from Earth, contains 9,096 stars. The most voluminous modern catalogues list on the order of a billion stars, out of an estimated total of 200 to 400 billion in the Milky Way .
From a colloquial name: This is a redirect from a colloquial name – either an unofficial name that is more commonly used than the official name, or a title that is unsuitable as a Wikipedia article title or other project page name – that serves readers because it is a good search term.
More than 60 veterans of World War II took off Friday from Dallas to France, where they will take part in ceremonies marking the 80th anniversary of D-Day. The group ranges from 96 to 107 years ...
An F-type main-sequence star (F V) is a main-sequence, hydrogen -fusing star of spectral type F and luminosity class V. These stars have from 1.0 to 1.4 times the mass of the Sun and surface temperatures between 6,000 and 7,600 K. [2] Tables VII and VIII. This temperature range gives the F-type stars a whitish hue when observed by the atmosphere.
Vertical service code. A vertical service code ( VSC) is a sequence of digits and the signals star (*) and pound/hash (#) dialed on a telephone keypad or rotary dial to access certain telephone service features. [1] Some vertical service codes require dialing of a telephone number after the code sequence. On a touch tone telephone, the codes ...
A G-type main-sequence star (spectral type: G-V), also often, and imprecisely, called a yellow dwarf, or G star, is a main-sequence star (luminosity class V) of spectral type G. Such a star has about 0.9 to 1.1 solar masses and an effective temperature between about 5,300 and 6,000 K (5,030 and 5,730 °C; 9,080 and 10,340 °F ).
Gamma Cygni ( γ Cygni, abbreviated Gamma Cyg, γ Cyg ), officially named Sadr / ˈsædər /, [11] [12] is a star in the northern constellation of Cygnus, forming the intersection of an asterism of five stars called the Northern Cross. Based upon parallax measurements obtained during the Hipparcos mission, it is approximately 1,800 light-years ...