Around our planet there is a magnetic field as a shield from the solar wind , particles charged with energy that the Sun ejects from time to time and that could end life on Earth.
In reality it is not something unique in our world, but other planets also have this magnetosphere. Mercury Jupiter, Saturn, Uranus and Neptune have it and even Ganymede, the satellite of Jupiter, has an external magnetic field, yes, it is not powerful enough to trap the particles of the solar wind and protect it.
The existence or not of a magnetosphere that surrounds the planets is essential to know the bodies that orbit the Sun and raise the possibility of the existence of life and survival of the human being on its surface.
