Question

Explain the following terms of oribital plane and circle of illumination?.

Answer 1

Circle of illumination

The circle of illumination is the division between day and night over the earth. The circle of illumination bisects (cuts in half) all latitudes on the spring and autumnal equinoxes. At this time, all places have equal day length (12 hours). The circle of illumination always bisects the equator (0 degrees latitude).

Orbit plane

The orbital plane of a revolving body is the geometric plane in which its orbit lies. Three non-collinear points in space suffice to determine an orbital plane. A common example would be the positions of the centers of a massive body and of an orbiting celestial body at two different times/points of its orbit.

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Answer 2

Explanation:

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