科学美国人视频版 >
科学美国人视频:2016行星大事记——木星、土星
下载视频(请右键另存为)

科学美国人视频:2016行星大事记——木星、土星

The Year in Planetary Science

2016行星大事记——木星、土星

Moving out into the solar system, there’s a place, a dwarf planet called Ceres—there’s water there, too, it seems! We’ve found actually what looks to be a cryovolcano—a volcano built from flowing liquid water rather than flowing liquid rock. Pretty crazy, even though there’s probably not an ocean there.

太阳系中有一个地方适合搬去居住——一个叫做“谷神星”的矮行星上。那里似乎也有水!实际上,我们疑似发现了一个低温火山——一个由流动的液态水而非流动的液体岩石组成的火山。听起来很疯狂,虽然那里可能连海洋都没有。

But if we move to Jupiter, one of its moons called Europa, there does seem to be a subsurface ocean there—we’ve known that for a long time. But now it seems, based on new observations with Hubble, there are plumes of water vapor emerging from this subsurface ocean, which is a good prospect for life and for us studying it.

但如果我们搬到木星的话,它有一个卫星叫做木卫二,那里似乎有一个地下海洋——这一点我们早就知道了。但现在看来,基于对哈勃的新观测,从这个海底的海洋中冒出了大量的水蒸气,这为生命的存在和对们的研究提供了一个良好的前景。

So the real news from Saturn is “the end of” news. Because the Cassini mission that’s been there for more than a decade is prepping for the end, changing its orbit, starting to dive through Saturn’s rings—uh lining up for what’s going to be a spectacular plunge into the atmosphere September 15 of next year, when it will burn up.

而土星的新闻就是“终结”。“卡西尼号”的任务已经持续了十多年,目前正准备结束,改变轨道,开始从土星的环带中俯冲下来。等到明年9月15日,它便会落入大气层燃烧起来,到时将会是一场壮观的景象,

Yeah they want it to burn up so that it won’t inadvertently crash into one of the moons and contaminate it, because there are a couple of moons—Titan and Enceladus in particular—where there’s also evidence of underground oceans where there could be life. And we don’t want to mess that up.

是的,他们想让它燃烧掉,以防它不小心撞到某个卫星,对其造成污染。毕竟有几个卫星,尤其是土卫六和土卫二,这两个卫星上有证据表明有海洋存在,而那里也有可能存在生命。所以,我们不想把那里搞得一团糟。

Yet more oceans in the outer solar system. Which leads us to Uranus and Neptune. We don’t really know much about them, and we won’t for some time because there’s no spacecraft there.

然而太阳系外还有更多海洋。这就将我们带到了天王星和海王星。我们对它们并不太了解,而且近期内也无法了解到什么,因为那里没有宇宙飞船。

Related Articles
内容推荐