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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!去年我们利用“新视野”号探测器对那里进行了探测,并且一直在分析相关数据,猜测那上面有什么。

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,可能有!似乎在几百公里的冰下深处还真有一片海洋,或者说它更像是水泥砂浆而不是水。但重点是,天哪!冥王星上竟然存在一片海洋?

That’s close enough for me.

对我来说,这已经够近的了。

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

然而,一定还有更远的地方。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”。有间接证据表明,那里有一颗比地球大九倍的巨大行星。再过几年,我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”——它是太阳系以外距离我们最近的行星。它距离我们大约4光年远,围绕着一颗名为“比邻星”的恒星运行。“比邻b”行星有一个很有意思的特点——它上面可能也有海洋存在,因为它大小和地球差不多。它在类似地球的轨道上运行,而在其表面可能会有液态水

But we have no idea if it does.

但我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,我们不知道。可能它会像金星,也可能像水星一样是个萎缩的葡萄干。

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

所以,如果让你必须在金星和水星之间做出一个选择,你比较想生活在哪个星球上?

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

我倾向于选择住在水星上,因为那里至少有晴天。

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