关于“黑洞”的趣事

Although there are still many unanswered questions about black holes， scientists have discovered many interesting facts about them.

尽管黑洞仍是未解之谜，但科学家已经发现了许多有关它的趣事。

Why do black holes appear black？

为什么黑洞是黑色的？

Color is an effect of light reflection—a natural phenomenon. It is why we perceive some things as red， some as blue， and others as green. Black holes do not reflect light， so they appear black.

颜色的呈现是光折射的效果——一种自然现象。这就是为什么我们可以看到不同颜色的事物，红的、蓝的、绿的。但黑洞不折射光，因此它是黑色的。

Why are they holes？

为什么黑洞被称之为“洞”？

On Earth， gravity helps us stay grounded. On the moon， however， there is very low gravity. That is why astronauts can jump very high on the moon. Black holes have very strong gravity—so strong that no object can escape being sucked into it.

在地球上因为有引力的帮助，我们才能站在地面上。然而，在月球上，引力微弱到几乎不存在。因此登月的宇航员才可以在月球上跳得很高。黑洞有着很强的引力，强到几乎能把所有东西吸进去。

How do black holes come into existence？

黑洞是如何产生的呢？

One way black holes form is from gravitational collapse. Theyre created when stars explode and collapse on themselves. If these stars have a very large mass， they form black holes.

黑洞形成的一种方式是由引力塌陷引起。它们是由于天体爆炸并自我塌陷形成的。如果这些天体的质量够大，那它们就会形成黑洞。

Do black holes differ in size？

黑洞大小不一致吗？

Yes， they do. There are four types of black holes： micro， stellar， intermediate mass and supermassive. If black holes attract many stars or combine with other black holes， they become very big. These are called supermassive black holes. Scientists say there is a supermassive black hole at the center of the Milky Way.

没错！有四种大小的黑洞：微型的，一般大小的，中等大小的以及超大的。如果黑洞吸引了许多星际物质或者与其他黑洞结合，它们就会变得非常大。这就是超大黑洞。科学家称在银河系的中心有一颗超大黑洞。

Can black holes disappear？

黑洞会消失吗？

A theory claims that they can disappear due to radiation. But this has not been proven yet.

There are many things we dont know about space， and scientists are still working on discovering new and interesting things. Maybe you will become a scientist and be the one to find answers to these questions！

理论上来说黑洞会因辐射消失，但是这未被证实。

太空中还有好多我们所未知的，科学家也仍然在探索新的、有趣的事物。將来也许你会成为一名科学家，去解答这些未解之谜！

Word Study

suck /s?k/ v. 吸;吮吸

She was noisily sucking up milk through a straw.

collapse /k?'l?ps/ v. & n. 倒塌;塌陷

The roof collapsed under the weight of snow.

The walls were strengthened to protect them from collapse.