What is Sun angle?
[[File:Oblique rays 03 Pengo.svg|thumb|Illustration of how [[sunlight]] is spread over a greater area in the [[Geographical pole|polar regions]].]] '''Sun angle''' is the [[angle]] of incidence at which [[sunlight]] strikes the [[Earth]] at a particular time and place. In most places the Sun rises in the morning, is highest at [[noon]], and sets in the evening. In different [[season]]<nowiki/>s the Sun is farther north or south. The angle controls the amount of [[heat energy]] received at this place, so [[summer]] days are usually warmer than [[winter]] nights. Seasonal change in the angle of [[sunlight]], caused by the tilt of the Earth's [[axis of rotation|axis]], is the basic mechanism that results both in warmth of the [[weather]] and in length of the day.<ref>Windows to the Universe. [http://www.windows.ucar.edu/tour/link=/earth/climate/cli_seasons.html Earth's Tilt Is the Reason for the Seasons!] {{Webarchive|url=https://web.archive.org/web/20070808022809/http://www.windows.ucar.edu/tour/link=/earth/climate/cli_seasons.html |date=2007-08-08 }}</ref> ==Related pages== *[[Temperature]] ==Notes== {{reflist}} {{Solar power}} [[Category:Climate]] [[Category:Seasons]] [[Category:Solar energy]]