The Chinese system was composed of five directions : North, South, East, West and circumpolar stars.
12.
As the observer moves northward the pole rises and the circumpolar stars appear, now unblocked by the Earth.
13.
The celestial Arctic Circle was regarded as identical to the circumference of the circumpolar stars and therefore a variable.
14.
Polaris is a circumpolar star, and so it is always seen pretty close to the direction of true north.
15.
The circumpolar stars appear to lie within a circle that is centered at the celestial pole and tangential to the horizon.
16.
In many ancient religions, the northern circumpolar stars were associated with darkness, death and the underworld of the dead.
17.
His " Catalogue of Circumpolar Stars " was published posthumously in 1838 with the help of fellow astronomer George Biddell Airy and others.
18.
For a circumpolar star, the complementary angle of the observer's latitude plus the complementary angle of the declination must be less than 90 degrees.
19.
Some Stars within the far southern constellations, such as Hydrus, roughly south of the Tropic of Capricorn (-23�� ), will also be circumpolar stars.
20.
When the observer is on the terrestrial Arctic Circle and the radius of the circumpolar stars is 66?the celestial Arctic Circle is identical to the celestial Tropic of Cancer.
