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And finally tonight, we simply can't leave without a longer look at today's liftoff of a huge new rocket from SpaceX.
Three, two, one.
The world's most powerful rocket, the Falcon Heavy, took off from Kennedy Space Center in Florida.
That's where NASA has long launched spacecraft. But, today, it was from the private company started by Elon Musk.
At least two million people watched it on the company's livestream on YouTube.
Our own science correspondent and resident space expert is here, Miles O'Brien.
And it's the focus of our weekly segment on the Leading Edge of science and technology.
Miles, welcome. Let's get the serious stuff out of the way. What is the goal of this effort?
Well, Elon Musk wants to go to Mars and colonize Mars. That's the top-line goal.
And this is one of the big, important steps along the way.
But part of getting to Mars and making that a practical idea is making it more easy to get to space.
And this is a lot cheaper. It's a fraction of the cost of anything NASA has built.
We used to say in the shuttle days, it was about $10,000 a pound for any pound of anything you put into space.
Elon Musk is down around $1,000 a pound.
So, we're talking about an order of magnitude improvement on cost, and that has to do with the reusability of these boosters.
今晚最后,节目结束前我们一定要仔细看看今天SpaceX巨型新火箭的发射情况。
三、二、一。
世界上最强大的运载火箭“猎鹰重型”,从佛罗里达州的肯尼迪航天中心发射升空。
一直以来,这里都是NASA发射航天器的地方。但是,今天的这架火箭来自埃隆・马斯克所创办的民营企业。
至少有二百万人观看了该公司在YouTube上的直播。
我们的自派科学记者和常驻空间专家迈尔斯・奥布赖恩做客节目。
科技前沿栏目是我们每周的重点。
迈尔斯,欢迎你。让我们先把严肃的东西放在一边。这此发射的目标是什么?
好,埃隆・马斯克想去火星,并在那里建立殖民地。这是最高目标。
而今天的发射正是这条道路上至关重要的一环。
但要想抵达火星并把目标变成现实,那就得先让进入太空变得易如反掌。
而且便宜很多。这些花费比起NASA建造的任何一样东西来说,都是九牛一毛。
在过去我们使用航天飞机的日子里,我们常说,任何一磅物品,只要送入太空,就得花费10000美元。
而埃隆・马斯克只要约1000美元就能完成。
所以,我们谈论的成本降低是一个数量级的降低,它关系到这些助推器的可重用性。
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