n. 北极星, 指导原则

[ noun ]
the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it
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Polestar \Pole"star`\, n.
1. Polaris, or the north star. See {North star}, under
{North}.

2. A guide or director.

North \North\, a.
Lying toward the north; situated at the north, or in a
northern direction from the point of observation or
reckoning; proceeding toward the north, or coming from the
north.

{North following}. See {Following}, a., 2.

{North pole}, that point in the heavens, or on the earth,
ninety degrees from the equator toward the north.

{North preceding}. See {Following}, a., 2.

{North star}, the star toward which the north pole of the
earth very nearly points, and which accordingly seems
fixed and immovable in the sky. The star [alpha] (alpha)
of the Little Bear, is our present north star, being
distant from the pole about 1[deg] 25', and from year to
year approaching slowly nearer to it. It is called also
{Cynosura}, {polestar}, and by astronomers, {Polaris}.