What is the knowledge of the sun?

The knowledge about the sun has:1. The sun is layered, and the visible surface that can be seen by the naked eye is called the photosphere, and its temperature can reach 6000 Kelvin. Inside the photosphere is the troposphere, and below the convection zone is the radiation layer, which extends from the center of the Sun to a distance of 20% of the radius of the Sun is the core of the Sun.

2. The size of the sun is huge, and its diameter is equivalent to 109 times the diameter of the earth.

3. The sun and the earth are far apart, and even if they travel at the speed of light, it will take 8 minutes and 30 seconds to reach them.

4. The Sun orbits the Milky Way once every 100 million years.

5. The outermost layer of the sun's atmosphere is called the corona, and the volume of the corona is even larger than the sun itself, and its temperature can reach one million kelvin.

The Sun is the central body of the solar system and occupies the overall mass of the solar system. The eight planets in the solar system, asteroids, meteors, comets, outer Neptune objects, and interstellar dust all revolve around the Sun, which revolves around the center of the Milky Way. The diameter of the Sun is equivalent to 109 times the diameter of the Earth, and the volume is about 1.3 million times that of the Earth.

From the point of view of chemical composition, the current mass of the sun is about 3 4 is hydrogen, and the rest is almost all helium, including oxygen, carbon, neon, iron and other heavy elements with a mass of less than 2%, using nuclear fusion to release light and heat into space.

The Sun is currently passing through the local interstellar cloud in the local bubble of the Orion Arm at the inner edge of the Milky Way. The closest star to the Sun is a red dwarf.

The Sun is a yellow dwarf, and the lifespan of a yellow dwarf is roughly 10 billion years, and the Sun is currently about 100 million years old.

The volume of the sun is 1.3 million times that of the earth, the central celestial body of the solar system, and an ordinary star in the Milky Way, the sun is 100 million kilometers away from the earth, with a diameter of 1.39 million kilometers, and it takes 3,500 years to walk from the earth to the sun, and 20 years to sit even if you take a plane.

The center, center of gravity, and core of the solar system.

The source of life and energy of the solar system.

The central object of the solar system, a luminous sphere with a diameter of 1,392,000 km, is the closest star to Earth and most closely related to Earth.

The Sun is the closest star to Earth and is the central body of the solar system. The mass of the solar system is concentrated in the sun. The eight planets in the solar system, asteroids, meteors, comets, outer Neptune objects, and interstellar dust all orbit (orbit) the sun.

The Sun is located on the spiral arm of Orion north of the galactic plane, about 30,000 light-years from the center of the Milky Way and about 26 light-years north of the galactic plane. The Sun is also rotating, and its cycle is about 25 days in the equatorial zone of the Sun; The polar region is about 35 days.

In the vast universe, the Sun is just a very ordinary star, and in the vast and vast starry world, the Sun's brightness, size, and material density are at a moderate level. It's just that because it's so close to Earth, it appears to be the largest and brightest object in the sky. Other stars are all very far away from us, even the nearest star, which is 270,000 times farther away than the Sun, and appears to be just a flickering point of light.

The Sun is a star

When you recognize the stars in the night sky, the teacher will tell you that most of the stars that can be seen in the sky are stars. A star is a type of star that produces a huge amount of energy due to a thermonuclear reaction taking place inside it, which makes it glow on its own. So what is the closest star to us?

In fact, we all know its name, which is the brilliant sun in the daytime sky. It brings us light and warmth. The growth of everything on earth, the evaporation of rivers and seawater, and the formation of underground deposits such as coal and oil are all related to the sun's rays.

Without sunlight, the temperature of the ground would drop to about absolute zero, and life on Earth would not exist. The sun is also the master of our solar system, and its massive mass accounts for more than 99 percent of the mass of the solar system. The symbol for the sun in astronomy is .

The position of the Sun in space

The Sun is just a very ordinary star in the universe, but it is the central object of the solar system. In the solar system, eight planets, including our Earth, some dwarf planets, comets, and countless other small bodies of the solar system, all orbit the sun under the strong gravitational pull of the sun.

The territory of the solar system is huge, and Pluto alone orbits nearly 40 astronomical units from the sun, that is, 6 billion kilometers away, while in fact the range of the solar system is dozens of times that of that.

But such a huge family of the solar system is just a very ordinary drop in the ocean in the Milky Way. Our Milky Way galaxy is home to at least 100 billion or more stars, about 100,000 light-years in diameter. Jumping beyond the Milky Way, we see that the Sun is located near the symmetry plane of the Milky Way, about 10,000 light-years from the center of the Milky Way and about 26 light-years north of the galactic plane.

It orbits the center of the Milky Way at about 250 kilometers per second, and at the same time moves toward Vega at a speed of kilometers per second relative to the surrounding stars.