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эфир

1) In Aristotelian physics, the fifth element, of which the stars and planets are made.

2) In Classical physics, an invisible medium that was thought to suffuse all space.

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Volatile flavor compounds naturally created during fermentation that add fruity, flowery and/or spicy flavors to beer.

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The compound formed by the elimination of water and the bonding of an alcohol and an organic acid.

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Химия; Органическая химия

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Химия; Органическая химия

A compound containing two ester groupings.

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Астрономия; Общая астрономия

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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.

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Астрономия; Общая астрономия

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

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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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