Vega , brightest star in the constellation Lyra ; Bayer designation Alpha Lyrae; 1992 position R.A. 18 h 36.7 m , Dec. +38°47′. A white main-sequence star of spectral class A0 V, its apparent magnitude is 0.1, making it the fifth brightest star in the sky. Vega is about three times the size of the sun and 50 times as luminous. Its distance from the earth is 26 light-years. Its name is from the Arabic for "falling eagle," referring to the figure that the Arabs associated with the constellation Lyra.
Vega , brightest star in the constellation Lyra ; Bayer designation Alpha Lyrae; 1992 position R.A. 18 h 36.7 m , Dec. +38°47′. A white main-sequence star of spectral class A0 V, its apparent magnitude is 0.1, making it the fifth brightest star in the sky. Vega is about three times the size of the sun and 50 times as luminous. Its distance from the earth is 26 light-years. Its name is from the Arabic for "falling eagle," referring to the figure that the Arabs associated with the constellation Lyra.
Vega
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Vega Two Soviet missions to Venus and comet Halley, both of which were launched in 1984.
A Dictionary of Earth SciencesAILSA ALLABY and MICHAEL ALLABY
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Vega
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views updated May 21 2018
Vega (Alpha Lyrae) White, main-sequence star in the constellation of Lyra; the fifth-brightest star in the sky. Its luminosity is 50 times that of the Sun.
World Encyclopedia
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