Astrometry includes topics such as Celestial mechanics and Orbital elements. Astrometry is the scientific measurement of the positions and motions of celestial bodies.
PrecessionLast Updated on 2009-03-28 at 22:07
The priests of ancient Babylonia and Egypt were also pioneer astronomers. They studied the heavens, mapped their constellations, identified the path of the Sun and estimated the... More »
EclipticLast Updated on 2009-03-25 at 19:04
Even though the planets move on the celestial sphere, they do not wander all over it but are confined to a narrow strip, dividing it in half. Stars along that strip are... More »