Days get shorter and shorter as you move from the equator to higher northern latitude. Solar designers must know the precise solar path angles for each location they design for, and how they compare to place-based seasonal heating and cooling requirements. The arc is right in the middle when the days and nights are 12 hours each on March 21st (the spring equinox) and September 21st (the autumn equinox). In the Northern Hemisphere, the winter sun (November, December, January) rises in the southeast, transits the celestial meridian at a low angle in the south (more than 43° above the southern horizon in the tropics), and then sets in the southwest. The deepest day of winter is called the winter solstice and is on December 21st in the Northern hemisphere. with the app in northern hemisphere mode) the winter (December) solstice is when the Earth is exactly at 12 o'clock from the Sun, the spring (March or Vernal) equinox is when the Earth is at 9 o'clock from the Sun, Summer (June) Solstice - it's at 6 o'clock and autumn (September or Autumnal) Equinox - it's at 3 o'clock from the Sun. This is as high as the Sun ever gets at the South Pole. In the Northern Hemisphere in summer (May, June, July), the Sun rises in the northeast, peaks out slightly south of overhead point (lower in the south at higher latitude), and then sets in the northwest, whereas in the Southern Hemisphere in summer (November, December, January), the Sun rises in the southeast, peaks out slightly north of overhead point (lower in the north at higher latitude), and then sets in the southwest. Just like at the North Pole, it's a constant sunset. The only difference is that the Sun is in the Northern sky, not the South. The difference in the length of the day between summer and winter, from here to the north, begin to be striking – slightly more than 8 hours at winter solstice, to more than 16 hours during the summer solstice. After the December solstice, the sun's path drifts northward again, returning to the celestial equator by the March equinox. Even in the height of summer in the Southern hemisphere (December 21st), the Sun at the equator never gets lower than 66.6 degrees above the Southern horizon. It is dark all the time. In the Northern Hemisphere, during the winter solstice (November, December, and January), the sun follows a path from the southeast in the morning, at a low angle over the celestial meridian in the south, and finally sets in the southeast. Plus, get practice tests, quizzes, and personalized coaching to help you How often is there a leap year. During the winter solstice, Sun does not rise more than 16.56° above the horizon at midday, but 63.44° in summer solstice above the same horizon direction. A latitude of 40 degrees north means that you are 40 degrees above the equator. Summer. For the Southern Hemisphere, the sign of the declination should be reversed. In the situation shown on the left (Northern Hemisphere winter solstice), the zenith angle at location A at noon is 90°, that is, the Sun does not rise above the horizon and no solar radiation is incident at the surface. Sun appear to move across our sky in the Northern hemisphere The two arcs are 46.88° (2 × 23.44°) apart, indicating the declination difference between the solstice suns. The first qualitative change occurs at 23.5° latitude, where the noon sun on the June solstice passes directly overhead. 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