Gravity of Earth or (). Gravitational acceleration contributes to the total gravity acceleration, but other factors, such as the rotation of Earth, also contribute, and, therefore, affect the weight of the object. Gravity does not normally include the gravitational pull of the Moon and Sun, which are accounted for in terms of tidal effects. It is a vector (physics) quantity, whose direction coincides with a plumb bob. A non-rotating perfect sphere of uniform mass density, or whose density varies solely with distance from the centre (spherical symmetry), would produce a gravitational field of uniform magnitude at all points on its surface. The Earth
Sun and Moon (Middle-earth) name given to the Sun by the Noldor. A poetic name for the Sun was the Daystar, and Gollum referred to it as the Yellow Face. The Sun was seen by the Elves as made on behalf of Men, and they valued the Moon more highly. Morgoth's creatures, the Orcs, feared the Sun, and with the exception of the Uruk-hai, they did not travel while it was in the sky. The Trolls of Middle-earth feared the Sun even more, and with great reason: they turned to stone under its light. Only the later Olog-hai were able to move under the