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Celestial equator

The celestial equator is a great circle on the imaginary celestial sphere, which could be constructed by inflating the Earth's equator until it intersects with said sphere. The celestial equator is inclined by ~23.5°, with respect to the ecliptic plane; a result of axial tilt.

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List of Palearctic ecoregions

... desert and tundra[?] PA1015 : Qilian Mountains subalpine meadows[?] PA1016 : Sayan Alpine meadows and tundra[?] PA1017 : Southeast Tibet shrub and meadows[?] PA1018 : ...