A star refers to a celestial object in the universe that is visible to the naked eye. The activity of the energy within the star causes the star to become irregularly shaped.

Stars can be roughly divided into planets, stars, comets, white dwarfs and so on. The brightness of a star is often expressed in magnitude. The brighter the star, the smaller the magnitude. The brightest planet is Venus, the fastest star travels at more than 240 kilometers per hour, and H1504+65 is the hottest white dwarf star.

There are two main factors that determine whether people observe stars as bright or dim. One is due to the size of the star's luminous power. The second is the distance between stars and people. Astronomers usually divide the ability of stars to emit light into 25 magnitudes, and the difference between the most luminous and the worst is about 10 billion times. A star that is close to people has a strong luminous power, so people will see it brighter. However, even if a star with a very strong luminous power is very far away from people, its brightness may not be as bright as a star that is tens of thousands of times worse than its luminous power.

Observing the starry sky can not only appreciate the beauty of the starry sky, but also expand our thinking. From the rising and setting of stars in the east to the "wandering" of large planets; from the radiant sun to fascinating star clusters and nebulae; from the milky Milky Way to the gigantic galaxy world, we can fully perceive the all-encompassing mysteries in the universe. . The love for the starry sky and the confusion about the universe will all unfold one by one in the process of stargazing.

In the process of observing the starry sky, we can learn professional knowledge about astronomy, become familiar with the operation of astronomical instruments, listen to the beautiful myths of constellations, immerse ourselves in romantic legends, or paint the dreamy sky with three or five friends. Talk about great ideals! Stargazing is also a healthy after-school leisure activity, which can not only cultivate one's self-cultivation, but also cultivate common hobbies and enhance mutual affection with classmates, family members and friends.