هامن ِ لاپلاس hâmon-e Laplace
*Fr.: plan de Laplace*
The plane normal to the axis about which the pole of a satellite's
orbit → *precess*es.
In his study of Jupiter's satellites, Laplace
(1805) recognized that the combined effects of the solar tide and
the planet's oblateness induced a "proper" inclination in satellite
orbits with respect to Jupiter's equator. He remarked that this
proper inclination increases with the distance to the planet, and
defined an orbital plane (currently called Laplace plane)
for circular orbits that lies between the
orbital plane of the planet's motion around the Sun and its equator
plane (Tremaine et al., 2009, AJ, 137, 3706). → *Laplace*; → *plane*. |