What is the surface of the sun?

The surface of the sun is the atmosphere.

Because most of the solar weather comes from the explosion of charged gas (plasma) in the corona, understanding the heating and magnetic field activities of the corona plasma will help to better predict solar weather events. Severe solar weather such as solar flares and coronal mass ejections will destroy satellites and power grids and affect life on earth.

The observation results of ultra-high angular resolution ultraviolet telescope reveal a highly structured dynamic upper chromosphere, and its fine resolution makes the structure visible for the first time. A large number of structures in a picture will quickly switch from one image to the next after 17 seconds.

Scientists used to think that these changes took place in five minutes or more. This chromosphere transient has important theoretical significance. For example, the proposed heating mechanism must be effective in a relatively short time.

Scientists have found the color ball feature in the vault image, which matches the feature based on shape and spatial correlation. They saw this feature in the coronal transition zone and the satellite images of the solar probe (TRACE) taken at the same time.

This comparison shows that the correlation between the two layers is much higher than previously thought, which means that similar physical processes will heat each layer. However, the theory predicts that the activity in the chromosphere should be lower than that observed by scientists in the emissions from the vault.

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 planets, asteroids, meteors, comets, exoneptune objects and interstellar dust in the solar system all revolve around the sun, and the sun revolves around the center of the Milky Way.

The sun is a star located in the center of the solar system, and it is almost an ideal sphere where hot plasma and magnetic field are intertwined. The diameter of the sun is about1392000 (1.392×10? ) kilometers, equivalent to 109 times the diameter of the earth.

The volume is about 6.5438+0.3 million times that of the earth; Its mass is about 2× 10 kg (330000 times that of the earth). From the chemical composition, about three-quarters of the mass of the sun is hydrogen, and the rest is almost helium, including oxygen, carbon, neon, iron and other heavy elements with mass less than 2%. Nuclear fusion is used to release light and heat into space.

The sun is currently passing through the local bubble region of Orion's arm at the inner edge of the Milky Way. There are 50 nearest star systems within 0/7 light-years from Earth/Kloc-(the nearest star is a red dwarf named proxima centauri, about 4.2 light-years).