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8 SIMPLIFIED SCIENTIFIC ASTROLOGY The hourly motion of the planets in their orbits is as follows:

Besides revolving in their orbits around the Sun, the planets also revolve upon their axes in the same direction as they revolve in their orbits; that is, from west to east. This movement is called the diurnal rotation.

The time occupied by the diurnal rotation of the planets is as follows:

The Sun also rotates upon an axis but requires about 608 hours or 25 1-3 days to complete one rotation.

The axis of a planet may be either perpendicular or oblique to its orbit. The present approximate inclinations of the axes are as follows: