Why does the same side of the Moon always face Earth? I know this is called tidal locking, but what is the underlying mechanism for this? Bill CarrollChicago, Illinois When the Moon first formed, it was a sea of molten lava. The immense gravity of Earth stretched this molten sea, raising tides on both the Continue reading "Why does the same side of the Moon always face Earth?" The post Why does the same side of the Moon always face Earth? appeared first on Astronomy Magazine .