太阳是一个奇特而动荡的地方。从一个安全的距离观望这个火热气球,表面上看起来很光滑,但实际上,太阳黑子、剧烈的爆炸和大量喷发的火山灰不断地在它的表面发生。科学家注意到每11年左右太阳风暴会变得特别强烈,这个周期就是众所周知的太阳活动周期。大约在相同的时间里,地球的磁极会突然发生翻转:北极变成南极,南极变成北极。 The sun is a strange and turbulent place. Looking at this hot balloon from a safe distance, it looks smooth on the surface, but in reality, sunspots, violent explosions, and massive eruptions of volcanic ash continue to occur on its surface. Scientists have noticed that the solar storm will become particularly strong every 11 years or so. This cycle is known as the solar cycle. At about the same time, the poles of the Earth will suddenly flip: The North Pole becomes the South Pole, and the South Pole becomes the North Pole.