Where is the point of the Earth that is closest to the Sun?
It will always be a point on or within the earth’s tropics (Tropic of Cancer in the north, Tropic of Capricorn in the south.) It is always at the longitude experiencing solar noon. It is always at the latitude at which the sun is exactly at the zenith. In fact, wherever the sun is at local zenith, all the other conditions are automatically met.
