Multiscale investigations of the galactic magnetic field

电磁力是自然界四种基本力之一。电场和磁场影响我们的方式多得无法一一列举。这在所有的尺度上都是正确的，从很小的尺度，比如控制我们身体的电脉冲，到很大的尺度，比如保护我们不受电离太阳风影响的地球磁场。事实上，电场和磁场在整个宇宙中都很重要，它们有助于恒星的形成，并为星系的引力坍缩提供支持。

Electromagnetism is one of the four fundamental forces in Nature. Electric and magnetic fields affect us in more ways than it is possible to list. This is true across all scales, from the very small, such as the electric impulses that control our bodies, to the very large, such as the magnetic field of the Earth that protects us from the ionized Solar wind. In fact, electric and magnetic fields are important throughout the cosmos, helping to form stars and providing support against gravitational collapse in galaxies.