Northern celestial hemisphere

At any given time, the entire Northern Sky is visible from the geographic North Pole, while less of the hemisphere is visible the further south the observer is located.

In the context of astronomical discussions or writing about celestial cartography, the northern celestial hemisphere may be referred to as the Northern Hemisphere.

Even if this geocentric model is the ideal projection of the terrestrial equator onto the imaginary celestial sphere, the northern and southern celestial hemispheres are not to be confused with descriptions of the terrestrial hemispheres of Earth itself.

The other 14 constellations (Aquarius, Aquila, Canis Minor, Cetus, Hydra, Leo, Monoceros, Ophiuchus, Orion, Pisces, Serpens, Sextans, Taurus, and Virgo) lie in some piece on the southern hemisphere.

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