Which of the nine planets in the solar system has life? Is there life?

At present, there are three planets in the solar system that people think may have life or can be transformed into space immigrants, namely 1 and Mars. Their revolution radius, ecliptic angle and rotation period are very similar to those of the earth. This makes it very similar to the four seasons of the earth, so that the earth's biological clock can adapt. Moreover, there is evidence that there have been large-scale floods in the history of Mars, and Mars also has a less thin atmosphere. 2. There is a frozen ocean on the surface of Europa, and there is probably liquid water under this ocean. If there is, the possibility of extremely low-level life forms cannot be ruled out; 3. Titan, the physical condition of its surface is very similar to that of the earth 3.9 billion years ago, that is, when life was just formed.

Other environment is not good, there is no life.