On Earth, the solar system objects that can be seen with the naked eye are not only the sun and the moon, but also the other five planets-Mercury, Venus, Mars, Jupiter and Saturn. The picture below is the scene of the moon, Saturn and Saturn appearing in the sky that the author took a few days ago:

It’s just that these planets themselves are not big enough and are far away from the earth, so they cannot be seen with the naked eye. details. These planets appear as glowing bright spots like stars outside our solar system.

However, if you use an astronomical telescope with a limit resolution exceeding that of the human eye, you can see the surfaces of the five major planets. Here are Jupiter and Saturn captured with a 150 mm astronomical telescope:

In an astronomical telescope, you can see the streaks of Jupiter, and you can also see the solar eclipse phenomenon on Jupiter, that is, the transit of Jupiter's satellites. Although Saturn is smaller and more distant than Jupiter, its beautiful rings are clearly visible through telescopes.

By the way, here are the pictures of the moon taken on the same day:

There is also the Theophilus crater on the surface of the moon:

This period is not about observing Mars. During the season, Mars is on the solar side of Earth's orbit, and it currently rises and sets almost at the same time as the Sun. Mars appears as a red dot because its surface is covered with iron oxide, giving it its red appearance. The picture below is the picture of Mars that the author took after the Mars opposition last year:

Venus is the planet closest to the earth (average distance). It is a planet in the orbit of the earth, and its size is close to the earth. Because the angular distance between Venus and the Sun is not large, it can only be seen for a short period of time before the Sun rises or after it sets. Venus looks very bright and is the brightest star in the night sky. Through an astronomical telescope, you can also see that Venus has obvious phase changes like the moon. The picture below is the profit and loss of Venus that the author took last year:

Since Mercury is the closest star to the sun, it The angular distance from the Sun is very small, making it very rare to see Mercury. So far, I have never seen Mercury with my own eyes. In fact, most people go their entire lives without ever seeing Mercury.