The Sun (English name: Sun) is a star, opposite to the moon. The eight planets in the solar system all revolve around the sun (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune). The sun is the only star in the solar system; It is the central celestial body of the solar system and the star of the Milky Way. The earth gets light and heat from the sun, so that everything in the world is no longer in a cool state and endless darkness.

That's great. The ancient word "Tai" was also called "Tai". Anyone who talks big and thinks the description is endless is "too". That's right. -"Guangya Poetry Art" said: "Later generations still say something, but think that the description is not complete, which is" too ". If you kill the customs, you will kill too much. The eldest son is a prince and Zhou Wang is king. "

Solar trajectory

Let's assume that point A in the picture below is the observation point, that is, the position of the observer. Point B is the zenith, and E, W, S and N respectively represent the east, west, south and north directions of the observer. The red arc in the picture represents the moving direction of the sun (rising in the east and setting in the west), and different arcs represent different seasons (summer solstice, vernal equinox and winter solstice).

When the observation point (a) is located in the northern hemisphere, the trajectory of the sun is inclined to the south, ① summer half year (vernal equinox->; The autumnal equinox) The sun rises in the northeast and sets in the northwest; ② At the vernal equinox and autumnal equinox, the sun rises due east and sets due west; (3) winter half a year (autumnal equinox->; The sun rises in the southeast and sets in the southwest.