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Light in the nighttime sky caused by the collision of atoms and molecules (primarily oxygen, OH, and Ne) in Earth's geocorona with charged particles and X-rays from the Sun or outer space. The airglow varies with time of night, latitude, and season. It is a minimum at zenith and maximum about 10?above the horizon.

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نوع المصطلح: اسم
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المجال / النطاق: علم الفلك
الفئة: فلك عام
Company: Caltech
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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 ...

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

атомдық нөмір (заряд нөмірі)

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

поляр шұғыласы

علم الفلك; فلك عام

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

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علم الفلك; فلك عام

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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المجال / النطاق: أعياد الفئة: مهرجانات

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The most important of the traditional Chinese holidays, Chinese New Year represents the official start of the spring, beginning on the first day of ...