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One of about a dozen of the strongest Fraunhofer lines seen in the Solar spectrum, the A band at 7600 angstoms is due to telluric lines of molecular oxygen in the Earth's atmosphere. (originally thought to originate in the Sun by Fraunhofer.)

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Industria/ámbito: Astronomía
Categoría: Astronomía general
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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Astronomía; Astronomía general

Trojan asteroid (60° ahead of Jupiter. It was the first Trojan to be discovered.

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Astronomía; Astronomía general

The number of protons in an atom's nucleus. This determines the type of element.

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Astronomía; Astronomía general

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

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Astronomía; Astronomía general

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 ...