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Our sun

Our sun (Picture 1)


The sun is the central celestial body of the solar system, accounting for 99.86% of the total mass of the solar system. The eight major planets in the solar system, asteroids, meteors, comets, extranet Neptune and interstellar dust all revolve around the sun, while the sun revolves around the center of the Milky Way. The sun was formed within a collapsing hydrogen molecular cloud about 4.57 billion years ago. The sun has reached middle age in the evolutionary stage of its main sequence, and fusion at this stage is the fusion of hydrogen to helium at the core. More than 4 million tons per second of matter are converted into energy at the core of the sun to produce neutrinos and solar radiation. At this rate, so far the Sun has converted about 100 Earth's mass into energy, and the Sun will spend a total of 10 billion years on the main sequence.

The sun is a star in the center of the solar system, which is almost an ideal sphere of intertwined thermal plasma and magnetic field. The sun's diameter is about 1392000 (1.392 × 10⁶) kilometers, which is 109 times the diameter of the earth. The volume is about 1.3 million times that of the earth. Its mass is about 330000 times that of the earth. In terms of chemical composition, about three-quarters of the mass of the sun now is hydrogen, with almost all remaining helium, including less than 2% by mass of oxygen, carbon, neon, iron and other heavy elements, Way to release light and heat to space. The sun is a yellow dwarf, yellow dwarf life expectancy of about 10 billion years, the current sun is about 4.57 billion years old. After about 5-6 billion years, almost all of the hydrogen inside the sun is depleted and the core of the sun will collapse causing the temperature to rise. This process will continue until the sun begins to fuse the helium with carbon. When the transition to a new element ends, the quality of the sun will drop slightly, and the outer layer will extend to the Earth or the current orbiting path of Mars.

The sun is just a very common star in the universe, but it is the central object of the solar system. In the solar system, the eight major planets, including our planet, some dwarf planets, comets, and numerous other small bodies of the solar system run around the sun under the force of the sun's gravity. The huge area of the solar system, Pluto, for example, runs about 40 astronomical units away from the Sun, which is 6 billion kilometers away, while in fact the solar system even tens of times larger than this. But such a huge family of solar systems is only a tiny drop in the galaxy. The Milky Way owns at least 100 billion stars and has a diameter of about 100,000 light-years. The sun is located on the Orion's spiral arm north of the galactic plane, about 30,000 light-years from the center of the Milky Way galaxy and about 26 light years north of the galactic plane. It revolves around silver center at a speed of 250 kilometers per second, 250 million years. The sun is also spinning, with a period of about 25 days in the solar equatorial zone and about 35 days in the bipolar area.

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