“small circle”的概念、定义、翻译、参考文献-科学参考

small circle

Mathematics

Astronomy

A circle on a sphere whose plane does not pass through the centre of the sphere. On the celestial sphere, all lines of declination are small circles except for the celestial equator, which is a great circle.

Geology and Earth Sciences

A circle on the surface of a sphere whose centre is not coincident with the centre of the sphere, so that a plane whose circumference is a small circle does not bisect the sphere. In a stereographic projection a small circle projects on to the plane of projection as a circle whose centre lies inside the primitive circle. If the small-circle plane is horizontal it will project as a circle smaller than the primitive circle but concentric with it. If it is vertical it will project as an arc, concave towards the centre of the primitive circle.

单词	small circle
释义	small circle Mathematics See great circle. Astronomy A circle on a sphere whose plane does not pass through the centre of the sphere. On the celestial sphere, all lines of declination are small circles except for the celestial equator, which is a great circle. Geology and Earth Sciences A circle on the surface of a sphere whose centre is not coincident with the centre of the sphere, so that a plane whose circumference is a small circle does not bisect the sphere. In a stereographic projection a small circle projects on to the plane of projection as a circle whose centre lies inside the primitive circle. If the small-circle plane is horizontal it will project as a circle smaller than the primitive circle but concentric with it. If it is vertical it will project as an arc, concave towards the centre of the primitive circle.
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