英语翻译a pulsar is a celestial object that emits light in short

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英语翻译
a pulsar is a celestial object that emits light in short burst a pulsar in the crab nebula flashes at a rate of 30 times/s,suppose the light pulses are caused by the rotation of a spherical object that emits light from a pair of diametrically opposed "flashlights" on its equator.what is the maximum radius of the pulsar if no part of its surface can move faster than the speed of light?

脉冲星是一种以短爆发形式辐射光的天体.假设球型天体赤道面上有一对“发光塔”,并且这对发光塔的联线构成赤道面的直径,进一步假设光脉冲产生于球形天体的转动,那么巨蟹座星云中的一个脉冲星的闪光频率是每秒30次.如果脉冲星表面的任何一部分的移动速度都比光速慢,那么脉冲星的最大半径是什么?

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