Why does the moon control tides

The Moon’s gravity contributes to tides by pulling more strongly on the side of Earth nearest it than on the far side. This difference across Earth creates tidal forces that redistribute ocean water.

How it works

The Sun also produces tidal forces. Spring tides occur when the Sun, Moon, and Earth are aligned near new or full Moon; neap tides occur near the quarter phases, when their effects partly offset.

Example or application

Many coasts experience two high and two low tides each lunar day, but local geography, ocean depth, and basin shape change the timing and height. Some places have a different tidal pattern.

Scope and limits

The Moon does not simply lift water directly beneath it everywhere. Tides reflect gravitational differences and the response of connected oceans, with local conditions shaping observations.

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