地球本身就是一块磁体。研究者们认为,是地球内部熔岩里对流流的作用使得整个地球像个拥有南北磁极的巨型磁体一样运转。每当你看着指南针的时候,你所做的就是读取你所在行星的磁场。
A: So that must be the biggest magnet than anywhere.
所以那就是最大的磁体咯。
B: Yet, even a magnet the size of a planet cant compete with a magnet the size of a star.
但是,即使是行星大小的磁体也不能和恒星大小的磁体相匹敌。
A: A star?
恒星?
B: what about the sun? The sun is a magnet. In this case, the magnetic field is probably generated by swirling plasma. Magnetic storms on the sun are powerful enough to have an effect on satellites and communication systems all the way here on Earth.
比如说太阳?太阳是一块磁体。假若这样,磁场可能是由旋动的等离子产生的。太阳上的磁暴威力足够强大,可以对人造卫星和地球上通信系统的各个方面产生影响。
A: So is that?
那就是最大的了?
B: Not even close. There are things in space that put all of these magnets to shame.
还差得远呢。宇宙中还有更多让这些磁体相形见绌的事物呢。
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