What is the summer solstice? Visitors welcome the sun at Stonehenge, June 21, 2023, in Wiltshire, England. In the Northern Hemisphere, the longest day of the year falls on the 21st of June.

If this were the dominant factor in determining the equation of time, then the azimuth of the Sun, observed at noon, would be greater than 180 during half of the year and smaller than 180 during ...

Putting that into perspective, if the Earth and sun were only 1 foot apart, the Parker probe would be about a 1/2 inch from the Sun's surface, according to NASA.