Main summary:

There are millions of stars in the cluster in the Milky Way galaxy, and they form a team, just like the police are divided into several teams. Some stars are far away and some are close. The brighter the stars look, the closer they are, the darker they look and the farther away they are. The farthest galaxy is more than10 billion light years away.

About the author:

Bian Yulin, a native of Taizhou, Jiangsu Province, was born in Shanghai in July 1943. 65438-0965, graduated from Astronomy Department of Nanjing University, and went to Beijing Observatory of Chinese Academy of Sciences to engage in scientific research. 65438-0998, edited by Shanghai Science and Technology Education Press.

At present, he is a member of the National Committee for Examination and Approval of Scientific Terminology, has translated 30 books, edited and co-authored more than 0/00 kinds of books, published more than 70 academic papers and published more than 500 popular science, scientific and cultural works. He won the 4th Shanghai Science Popularization Award. His works have won many awards, such as the National Book Award, the "Five One Projects" Book Award, the China Book Award and the National Library Golden Book Award.

Related astronomical knowledge:

1, constellation:

In short, in order to identify the starry sky more conveniently, the ancients used imaginary lines to connect the brighter stars in the sky into a group called "constellations".

2. Stars:

The star is a spherical luminous plasma condensed by gravity, and the sun is the closest star to the earth.

3. Planets:

Usually refers to a celestial body that does not emit light by itself and surrounds a star. Its revolution direction is often the same as the rotation direction of the surrounding stars. Generally speaking, a planet needs to have a certain mass, and the mass of the planet should be large enough to approximate a sphere.

4. transit of venus:

Venus's orbit is in Earth's orbit. At some special moments, the earth, Venus and the sun will be in a straight line. At this time, Venus can be seen from the earth moving slowly on the surface of the sun like a small black dot.