What is the knowledge about the starry sky?

1. In space, various celestial bodies also radiate electromagnetic waves, and many celestial bodies also radiate high-energy particles to form cosmic rays. For example, the sun has solar electromagnetic radiation, solar cosmic ray radiation and solar wind. Solar cosmic rays radiation is the high-energy particles emitted by the sun when a flare occurs, and the solar wind is the high-energy plasma stream blown out by the corona.

2. Many celestial bodies have magnetic fields, and the magnetic fields will capture high-energy charged particles on them, forming radiation belts with strong radiation. For example, there are two radiation belts above the earth. It can be seen that space is still a strong radiation environment.

3. The activity of energy inside the star makes the shape of the star irregular. Stars can be roughly divided into planets, stars, comets, white dwarfs and so on. The brightness of a star is usually expressed in magnitude. The brighter the star, the smaller the magnitude. The brightest planet is Venus, the fastest star runs at a speed of over 2.4 million kilometers per hour, and H 1504+65 is the hottest white dwarf.

Extended data:

The brightest planet:

1. On the earth, human beings can see five planets with naked eyes, of which Venus is the brightest. Although Venus is not as bright as the sun and the moon, it is 14 times brighter than the famous Sirius (the brightest star except the sun in the whole day), just like a dazzling diamond.

Venus is not only bright, but also "personalized". It is the only big planet in the solar system that rotates in the opposite direction to other planets, from east to west. Therefore, on Venus, the sun rises in the west and sets in the east.

3, the oldest star, since ancient times, people will use "eternity" to describe the long time, but eternity is not as long as a star. 36,000 light years away from the Earth, there is a giant star with the number HE0 107-5240, and its age is about 65.438+0.32 billion years old.

References:

Baidu encyclopedia-star

References:

Baidu encyclopedia-space