Planets that have magnetic fields also have a magnetosphere. Venus and Mars are the only planets that do not have a magnetic field and some scientists believe that the loss of their magnetic fields could have been the reason why they lost their oceans. The Earth’s magnetic field protects us from space debris and the charged particles of solar winds. If solar winds break through the atmosphere, they can emit dangerous radiation. The magnetosphere is the area around a planet in which those charged particles are kept at bay.  We can actually hear the sounds of them too. The NASA Radiation Belt Storm Probes mission's (RBSP) captured the odd sounding radio waves, which you can listen to here. The magnetosphere is controlled by the magnetic field of the planet. So, the stronger the magnetic field of a planet, usually the stronger the magnetosphere. For instance, Jupiter is 317 times the mass of the Earth. Its magnetosphere is nearly 100 times larger and 20,000 times greater than the Earth’s. Therefore, the density of charged particles in the area around Jupiter is much greater as well. The structure and behavior of the magnetosphere involves more complexities than just the mass of a planet however. Several factors affect it, but the most essential part is the magnetic field. When solar wind particles collide with the magnetosphere, some still escape through and some scientists believe that it is what we see in the Northern Lights. In general, the magnetosphere is like a shield that protects us. We have this shield thanks to the present magnetic field, which helps protects the atmosphere and us.