英语听力：自然百科 行星旅行：土星 Saturn—18

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It'll be a place for people who want to go to see a true exotic and alien world. Not even a minor³ rip in the suit will be life threatening. 

 

I did a calculation once whether the small amount of carbon monoxide in Titan's atmosphere will kill you before the hydrogen inside ?? did, actually turns out both probably only enough to give you a headache, but the place will probably smell like an oil refinery⁴.

Speaking of refineries⁵, refueling for the return trip could be as simple as pulling up to the nearest lake to fill up your methane⁶ rocket now under test development on earth.

 

And if you reach as far as Titan, why not a site trip to Enceladus as well? On Enceladus, we are many steps ahead where we are in terms of we already know that there are organics, we already know where they are, we already know how to get them, it's time to bring them back to earth and look at them and ask the next level of questions: are they biological?

 

It may not happen for a very long time, but I really think that's a must-do for us in taking the next step. .And to me, the question of whether or not life has got started elsewhere and the solar system is the reason why we do this. You know because we want finally, ultimately we want to come to understand why the earth has been the successful abode⁷ of life that it has become.

 

Moving now into the extended, extended mission, the Cassini team met recently in London to take a start of where they've been and to plan the road ahead. It's the fiftieth time they've met and fitting that they chose the Royal Observatory⁸ in Greenwich to celebrate.

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