Venus caught in the southern hemisphere. Where is it? Please find it yourself. Petr Horálek / APOD / NASA
In fact, for people who live in the city, the starry sky is very simple, you can't see too many stars.
As long as your city is a little more prosperous, you won't be able to see the stars in the sky. All you can notice in the bright night sky is the moon, and a handful of stars—including most of the planets visible to the naked eye and some of the brightest stars.
Aside from the Sun, the brightest star in the sky is Sirius, and the brightest star in the sky is a planet, Venus. It usually appears only in the western or eastern sky some time after dusk to sunset, or around dawn.
Venus is a planet that revolves around the Sun, and its orbit is on the inside of Earth's orbit, so we can only see it around dusk or dawn. When it disappears from the west and appears in the east of dawn, it means that it runs from one side of the sun to the other side of the sun. And in the process, when it runs in the sky very close to the sun, we can't see it with the naked eye—because it will be overwhelmed by the sun's brilliance.
The West calls Venus Venus. Ancient China treated Venus as two stars. Those that appear in the west are called the evening star, and those that appear in the east are called the morning star. The morning star is also known as the day star.
Venus is very bright and is a celestial body in the night sky that is second only to the Moon in brightness. Venus is very close to Earth at many times of its orbital cycle, and it has a dense atmosphere with fairly high reflectivity, so it appears extremely dazzling from the sun.
If you observe it with a small telescope at a certain magnification, you can easily see that Venus will take on various phases like the Moon. Sometimes it looks like a half moon, sometimes it looks like a crooked crescent.
Because Venus is so bright and doesn't flicker like a star, many people who inadvertently find it in the sky have the first instinct to even think that it is not a star, but something else. UFO？
Many people also think of Venus as the North Star. But it really isn't. Polaris is more famous because it is the only star in the sky where flesh is visible and does not shift due to the rotation of the Earth, so it can be used to identify directions. But the North Star is not so bright. Although it can be seen in places with mild light pollution in the wild, it is almost invisible in large cities.
Venus, as a planet, is The Sister Star of Earth. Its volume, mass, composition and earth are very similar. It is believed that Venus and Earth were most likely born from the same mass of nebula material. Venus and Earth are so similar that some scientists believe that Venus was also suitable for life. But today's Venus has extremely high atmospheric pressures and temperatures, and it is a hot hell with sulfuric acid rain.
Moon, Venus (top left), Jupiter (right), and Horns (below Venus). The trajectory on the far right is left by an airplane. Michael Wilson / APOD / NASA
Venus also often plays a leading role in many celestial phenomena known as "conjunctions" in the sky. "Conjunction" refers to a wonderful celestial phenomenon in which two or more planets or bright stars are visually extremely close. For example, people often say that gold and wood are together, which means that Venus and Jupiter are very close to each other visually.
At dusk or dawn, you might as well look out over the sky to the west or east, and if you're lucky, I'm sure your eyes will be instantly drawn to this incredibly bright star. If you happen by chance, you'll also find other "uninvited guests" around it.