Above them are red supergiants, massive stars beginning their death stage.

在它们上面是红超巨星，即开启死亡阶段的巨大的恒星。

You can see some stars that are also that luminous but at the upper left; those are blue supergiants.

你们可以看到有些恒星也有那么亮，但是在左上方；那些是蓝超巨星。

Rigel, another star in Orion, is a blue supergiant, putting out over 100,000 times as much energy as the Sun!

参宿七——猎户座的另一颗恒星，是一颗蓝色超巨星，发出的能量是太阳的10万倍以上！

Soon we'll pass the supergiant elliptical galaxy M87.

很快我们就会经过超巨椭圆星系 M87。

For example, Betelgeuse in Orion is a red supergiant, and one of the brightest stars in the sky despite being over 600 light years away.

例如，猎户座中的参宿四是一颗红色的超巨星，尽管它距离我们超过了600光年，但仍然是天空中最亮的恒星之一。

It swells up just as the Sun will, but instead of becoming a red giant, it generates so much energy it becomes a red supergiant.

它会像太阳一样膨胀，但它没有变成红巨星，而是产生了大量的能量，变成了超大星。

If both stars had formed at the same time, the scientists say, the massive star would have quickly turned into a " supergiant" and swallowed the other star before it had a chance to fully develop.

科学家表示，如果这两颗恒星同时形成，这颗质量大的恒星就会迅速变成一颗“超巨星”，并在另一颗恒星完全形成之前吞噬掉它。