Is the sub-solar point Earths closest point to the sun?
By definition, the subsolar point is the point on the Earth’s surface at which the Sun is at its highest (or lowest) latitude at local solar noon. Subsolar points change daily moving from 23.5 degrees South to 23.5 degrees North (the solstices) and back throughout the year. To the extent that the subsolar point is directly beneath the sun (i.e., when the sun’s rays are exactly perpendicular to the Earth’s surface), it would also be true that the closest point on Earth to the sun at that particular point in time would be the subsolar point.
