A supernova explosion is a violent explosion that some stars experience near the end of their evolution.

超新星爆发是某些恒星在演化接近末期时经历的一种剧烈爆炸。

The process of a supernova explosion lasts about a second.

超新星的爆发过程大概只持续一秒钟。

Supernovae explosions are almost impossible to predict.

超新星的爆发几乎无法预测。

At least one supernova occurs per decade in our galaxy.

每十年至少有一颗超新星在我们的银河系中出现。

A bluish ribbon of light stretching from left to right across the picture might be a knot of gas ejected by the supernova.

一个从左延伸至右穿过整幅图片的浅蓝色光可能是由超新星喷发出的气体的集结体。

Now consider a supernova explosion.

现在考虑一次超新星爆发。

In particular, consider Supernova 1987a.

特别是超新星1987a。

This is his seventh supernova discovery.

这是保罗·格雷第七次发现超新星。