The spin-down rate has been measured for almost every radio pulsar, and theory indicates that it depends on the strength of the star's magnetic field. 這種自轉變慢的速率，幾乎每一顆無(wú)線(xiàn)電波霎都量得到，而理論指出，此速率和星體的磁場(chǎng)強度有關(guān)。
At 100,000 times the strength of the Earth's magnetic field, the university's magnet is so strong it pulls on the steel shanks in the shoes of people who come near it. 利諾大學(xué)那塊磁鐵的磁場(chǎng)強度是地球的十萬(wàn)倍，強到人們走近它時(shí)，鞋子里的鐵心都會(huì )被吸引。
