Origin of the sun.

The best answer: “day” is a typical pictographic character, which was drawn by the ancients according to the shape of the sun when they saw the sun in the sky. The word “day” was originally a circle with a little bit in the middle. The mouth outside the word “day” is the outer ring of the sun, and the middle point is the sun. Later, it slowly evolved into today’s “day”, that is, it changed the middle point into a horizontal and the outer circle into a frame.

The word “day” is a typical pictographic character, which was drawn by the ancients according to the shape of the sun when they saw the sun in the sky. The word “day” was originally a circle with a little bit in the middle. The mouth outside the word “day” is the outer ring of the sun, and the middle point is the sun. Later, it slowly evolved into today’s “day”, that is, it changed the middle point into a horizontal and the outer circle into a frame.

Sun:

The sun is the central celestial body of the solar system, accounting for 99.86% of the total mass of the solar system. Eight planets, asteroids, meteors, comets, outer Neptune celestial bodies and interstellar dust in the solar system all revolve around the sun, while the sun revolves around the center of the Milky Way galaxy.

The sun is a star in the center of the solar system, and it is almost an ideal sphere interwoven by thermal plasma and magnetic field. The diameter of the sun is about 1392000(1.392×10? ) km, equivalent to 109 times the diameter of the earth; Its volume is about 1.3 million times that of the earth. Its mass is about 2×10? ? Kilogram (330,000 times of the earth). In terms of chemical composition, about three quarters of the mass of the sun is now hydrogen, and the rest is almost helium, including oxygen, carbon, neon, iron and other heavy elements, with the mass less than 2%. Nuclear fusion is adopted to release light and heat to Tai 空.

At present, the sun is passing through the interplanetary cloud in the local bubble zone of Orion’s arm at the inner edge of the Milky Way. There are 50 nearest star systems within 17 light-years from the Earth (the star closest to the Sun is a red dwarf called proxima centauri, which is about 4.2 light-years).

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