альфа2 CVn

альфа2 CVn

A spectrum variable with spectrum showing strong, profuse lines of rare earths, iron-peak elements, and Si.

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Del af tale: noun
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Branche/domæne: Astronomy
Category: General astronomy
Company: Caltech
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Star with spectral type A in which the spectrum of the Balmer lines of hydrogen attain their greatest strength. Helium lines can no longer be seen. Some metallic lines are ...

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the light produced by excited atoms and ions in the upper atmosphere of a planet

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1) Angular distance from the north point eastward to the intersection of the celestial horizon with the vertical circle passing through the object and the zenith. 2) Directional ...

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