direct (rotation) Axial rotation or orbital rotation in a counterclockwise direction when viewed looking down from above the Sun's north pole, or the movement of a body from west to east on the celestial sphere. Also known as prograde, it is the normal direction of orbital and axial movement in the Solar System; its opposite is retrograde. Related category • CELESTIAL MECHANICS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |