nebeski ekvator

nebeski ekvator

The great circle of the celestial sphere all points of which are 90 degrees from the poles. It is the plane of the earth's equator projected onto the celestial sphere.

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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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