circumpolar region | has coordinates whose equatorial latitude is greater than the Earth latitude of the observer minus 90 degrees | |
is a part of celestial sphere | |
has purpose to define a part of the sky which can be observed all year at the observers location | |
has definition a region defined by an equatorial latitude above which stars are visible all year (depends on observers location on Earth) | |
is an instance of equatorial sky area | |
equatorial sky area | is defined using equatorial coordinates | |
quantity | has unit | |
number | has value | |