蟹状星云脉冲星是脉冲星风星云中最为著名的一个，但它已经950岁了。

The Crab pulsar, the best-known example of a bright pulsar wind nebula, is about 950 years old.

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蟹状星云脉冲星是脉冲星风星云中最为著名的一个，但它已经950岁了。

The Crab pulsar, the best-known example of a bright pulsar wind nebula, is about 950 years old.

youdao