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科学美国人视频:2016行星大事记——更远处的行星
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科学美国人视频:2016行星大事记——更远处的行星

The Year in Planetary Science

2016行星大事记——更远处的行星

On to Pluto

下面来看冥王星。

Right, on to Pluto! We visited it last year with New Horizons and we’ve been analyzing the data ever since—and guess what’s there.

对,看冥王星!上一年咱们使用“新视野”号勘探器对那里进行了勘探,而且一直在剖析相关数据,猜想那上面有什么。

Could there be an ocean?

那里会有海洋吗?

Could there be an ocean? Yes there could be! It looks like there’s one deep down beneath a few hundred kilometers of ice, maybe more like slush than water—but gosh, an ocean on Pluto?

会有海洋吗?答案是,或许有!好像在几百公里的冰下深处还真有一片海洋,或许说它更像是水泥砂浆而不是水。但重点是,天哪!冥王星上居然存在一片海洋?

That’s close enough for me.

对我来说,这现已够近的了。

But of course there’s stuff farther out. Mike?

但是,必定还有更远的当地。对吗,迈克?

Well yes.

是的。

Some people call it Planet X, some people call it Planet Nine. There’s indirect evidence of a gigantic planet, 10 times as massive as Earth. We should know within a couple of years whether it’s actually out there.

有些人称其为“X行星”,有些人称之为“九号行星”。有直接依据标明,那里有一颗比地球大九倍的巨大行星。再过几年,咱们就能知道它是否真的存在。

Another unnamed planet is Proxima b—that’s the nearest neighboring planet to us outside our solar system. That’s about four light-years away and orbits a star called Proxima Centauri. But what’s interesting about Proxima b is that it may also have an ocean because it’s about the same size as Earth. It’s in an Earth-like orbit where you could have liquid water on its surface.

还有一个未命名的行星“比邻b”——它是太阳系以外间隔咱们最近的行星。它间隔咱们大约4光年远,围绕着一颗名为“比邻星”的恒星运转。“比邻b”行星有一个很有意思的特色——它上面或许也有海洋存在,由于它巨细和地球差不多。它在相似地球的轨道上运转,而在其外表或许会有液态水

But we have no idea if it does.

但咱们不知道那上面是否真的有水。

No idea. Could be Venus, could be a little shrunken raisin like Mercury for all we know.

对,咱们不知道。或许它会像金星,也或许像水星相同是个萎缩的葡萄干。

So if you had to choose between Venus and Mercury, which one would you want to live on?

所以,假如让你必须在金星和水星之间做出一个挑选,你比较想日子在哪个星球上?

I would rather live on Mercury, because at least you get sunny days.

我倾向于挑选住在水星上,由于那里至少有晴天。

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