Click here to see an example of a secure and flexible seat in trot. Watch closely as the rider's hips, pelvis, and legs flex freely with the horse's movement. Horse's willingly raise their back up under a seat like this, probably because it feels a bit like getting a gentle back rub with each step.
The celestial sphere is divided by the celestial equator. In astronomy and navigation, the celestial sphere is an imaginary sphere (ball) of a very large unspecified size. The sphere is concentric with the Earth. This means that the celestial sphere and the earth have the same centre. They also rotate upon the same axis.
Celestial equator-the imaginary line encircling the sky midway between the two celestial poles. Celestial poles-the imaginary points on the sky where Earth 's rotation axis, extended infinitely, would touch the imaginary celestial sphere ...t's anchored to the celestial poles and the ~ (directly above Earth 's equator). Declination and right ascension are the celestial equivalents of latitude and longitude. Declination-Similar to latitude on the Earth 's surface. The distance in degrees north or south of the ~ (similar to the Earth 's Equator).