Subsolar point

The subsolar point on a planet is when its Sun looks like it is directly overhead (in zenith). For planets with a rotation like the Earth's, the subsolar point will move westward, circling the globe once a day.

Subsolar Point Media

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  A basic diagram showing the location of the subsolar point on Earth's surface. The angle between the Sun and the local horizontal level is exactly 90° at the subsolar point.