ASTR 1210 Lecture Notes - Lecture 11: Tide, Tidal Locking

• School: University of Virginia
• Department: Astronomy
• Course: ASTR 1210
• Professor: Murphy Edward

Document Summary

The moon raises tides on the earth. The height of the tide depends on local conditions. It can be as little as 30 cm or as much as 16 meters. Water tides are primarily caused by the horizontal component of the moons force of gravity on the surface of the earth. There are two high tides and two low tides per day. The differential force across earth can distort the shape of our. The solid earth rises and falls by as much as 20 cm. planet. Even though the sun is much more massive than the moon, its tidal force on earth is less than the tidal force of the moon. The tidal force from the sun can either add or subtract from the lunar. A spring tide occurs during new and full moons. During this time, the tidal bulges are larger than average. A neap tide occurs during the first and third quarter moons.