Please talk about the possibility of life in other planets or satellites in the solar system and other galaxies outside the solar system.

We say that since ancient times, people living on the earth often wonder whether there is another earth besides the one we live in. Well, from an astronomer's point of view, it is quite difficult to find another earth. So let's see, how do we find another earth? In other words, let's take a look at the paradise where this person lives. It is only after we understand the situation of the earth that it is possible to think and really find another earth. There are several main conditions for people to live on the earth: one is that our earth is very suitable from the sun, not too far or too close; Too close, too close to the sun, scorched people. Too far is not good, the distance from the sun should be appropriate. Second, this quality is also suitable, just right. If the earth is heavy, it is particularly heavy! That's also very troublesome. We humans will naturally become heavier and have a series of problems, so the gravity of the earth itself is just right. Another point is that the chemical composition of the earth is also suitable. At present, the chemical composition of the earth is very suitable for all aspects.

In addition, our earth has another advantage. The composition of the atmosphere is suitable, and this atmospheric composition is also very important. We say that there are ozone layer and ionosphere below the atmosphere. Then these ozone layers and ionospheres are not only the barriers of our earth, but also the protection of the earth. We know that the ionosphere is still useful, just as our human communication can be reflected through the ionosphere. So this atmosphere is very suitable. We say that the overall conditions of the earth are good, which is very suitable for human survival.

Then we are not satisfied with just living on the earth. Let's go outside and see if there are any other places suitable for human survival, or if there is more advanced life in that place. More advanced than us, that is possible. Let's look outside. As we all know, despite the rapid development of this science, it is difficult to find an "earth" outside! What are we looking for first? See if there is life in other parts of our solar system, or if there are people or people who can live there. Let's look at the solar system first, so our first step is to look at the solar system and see if there is other life. So is there any other life in the solar system?

Among the nine planets, we searched one by one, and we did some exploration on all the planets. So what is the planet that is likely to produce life so far? It's Mars. The conditions on Mars are quite bad, much worse than those on our earth. There are many sandstorms there, and its atmosphere is mainly carbon dioxide. So it is probably not suitable for life, including the growth of living things and plants. Are there any suitable conditions on other planets in the solar system besides Mars? Then we looked at most other planets, and the results were not good, much worse than Mars. Mars is almost, but the others are worse. Some have no atmosphere, some have too much atmosphere and the temperature is very poor, which is not suitable at all. But there is a celestial planet, which shows that its "moon" is very interesting. What is this? It is interesting to find a satellite on Jupiter recently. This is part of Jupiter's moon. Which satellite is interesting? Just this Europa next to Jupiter, this satellite is very interesting. What's the fun? In fact, this satellite Europa, if we take pictures of it carefully, its color will change a little. Not only does the color change a little, but there are also some stripes. And there is some atmosphere on Europa, and there may be water on it. There are indications that this Europa is probably possible if people want to survive. Because there is a very important condition that you have to have water and atmosphere. So this place is a little close, so it's interesting. Not to mention other satellites. It is inconceivable that people can survive. So what's our conclusion? In other words, at present, there is no real life in the solar system. But what does this solar system offer? It provides us with space to develop the solar system. Although we haven't found life yet, this space is not bad.