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      科學美國人視頻:2016行星大事記——更遠處的行星
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      科學美國人視頻:2016行星大事記——更遠處的行星

      The Year in Planetary Science

      2016行星大事記——更遠處的行星

      On to Pluto

      下面來看冥王星。

      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.

      對,看冥王星!去年我們利用“新視野”號探測器對那里進行了探測,并且一直在分析相關數據,猜測那上面有什么。

      Could there be an ocean?

      那里會有海洋嗎?

      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?

      會有海洋嗎?答案是,可能有!似乎在幾百公里的冰下深處還真有一片海洋,或者說它更像是水泥砂漿而不是水。但重點是,天哪!冥王星上竟然存在一片海洋?

      That’s close enough for me.

      對我來說,這已經夠近的了。

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

      然而,一定還有更遠的地方。對嗎,邁克?

      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.

      有些人稱其為“X行星”,有些人稱之為“九號行星”。有間接證據表明,那里有一顆比地球大九倍的巨大行星。再過幾年,我們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.

      還有一個未命名的行星“比鄰b”——它是太陽系以外距離我們最近的行星。它距離我們大約4光年遠,圍繞著一顆名為“比鄰星”的恒星運行。“比鄰b”行星有一個很有意思的特點——它上面可能也有海洋存在,因為它大小和地球差不多。它在類似地球的軌道上運行,而在其表面可能會有液態水

      But we have no idea if it does.

      但我們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.

      對,我們不知道。可能它會像金星,也可能像水星一樣是個萎縮的葡萄干。

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

      所以,如果讓你必須在金星和水星之間做出一個選擇,你比較想生活在哪個星球上?

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

      我傾向于選擇住在水星上,因為那里至少有晴天。

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