Wednesday, September 21, 2011

CELESTIAL NAVIGATION

7:08 AM  navigation  No comments

                                                            ECLIPTIC



Ecliptic is a great circle on the celestial sphere in the same plane as the plane of the earth's orbit around sun.Thus the sun's apparent annual path on the celestial sphere is Ecliptic 





OBLIQUITY OF THE ECLIPTIC




Is the angel between the plane of the equinoctial and that of ecliptic
It is value approximately 23.5 degrees

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