надир

надир

The point on the celestial sphere that is diametrically opposite the zenith, so that the zenith, nadir and center of earth are in one straight line. It is always 90 degrees below the horizon.

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Loại từ: noun
Từ đồng nghĩa:
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Ngành nghề/Lĩnh vực: Astronomy
Category: Mars
Company: NASA
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The straight line, real or imaginary, passing through a rotating body and is the line about which that body rotates.

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