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Any planet or moon that has an atmosphere that is sufficiently dense at some point to support turbulent mixing will have a density knee above which the atmosphere fails to be dense to support turbulent mixing. This density knee is the object's turbopause. The Earth's atmosphere has a turbopause, as do the atmospheres of Venus, Mars, the giant planets, and ...


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I think the terms would be northern and southern celestial hemispheres respectively, possibly qualified by 'ecliptic'. However those terms depend on the coordinate system you're using. The usual two are both Earth-based, either the equatorial coordinate system, or the ecliptic coordinate system. I think that, unqualified, 'northern celestial hemisphere' ...


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