它的残余物组成了蟹状星云.

Its remnants form the Crab Nebula.

其中最著名的当属诞生了蟹状星云的那场超新星爆炸。对吧？

The most famous of all of them is probably the supernova explosion that gave rise to the Crab Nebula. Yeah?

蟹状星云就是“超新星”爆炸的受害者，那次爆炸发生在公元1054年。

The Crab Nebula is the expanding wreckage from a supernova that occurred in the year 1054.

这个物体，这蟹状星云的脉冲星,辐射出丰富的x射线，以及伽马射线。

And this object, this pulsar in the Crab Nebula is radiating copious amounts of x-rays, of gamma rays.

l 蟹状星云是一颗超新星的残骸。这颗超新星在公元1054年爆发（译注：《宋史·天文志》中有记载）。

L The Crab nebula is the remains of supernova that exploded in AD 1054.

天体物理学家们长久以来一直将蟹状星云的X射线波段视作稳定的“标准烛光”。

Astrophysicists have long thought of the Crab Nebula as a steady “standard candle” in X-ray wavelengths.

蟹状星云脉冲星变慢。

The Crab Pulsar is slowing down.

蟹状星云波霎每秒大约自转30次。

Crab Pulsar rotates about 30 times each second.

有一个物体叫做,蟹状星云脉冲星。

There is an object which we call the Crab Pulsar.