字幕列表 影片播放 列印英文字幕 I'm Don Pettit. I'm a NASA astronaut and I'm on the International Space Station We're currently about 240 nautical miles above the surface of Earth. [...theme music starts...] (242.5 nautical miles, NM) (almost 450 kilometers, KM) I S S [...music intensifies...] [...music fades out...] Space Station is a serious place. We're doing serious researches, scientific research and engineering research. We have a Regenerative Life Support system, which is a fancy way of saying that we've got a toilet that you use, and then a machine that goes, "Chugga chugga chugga chugga.. chug," and then you go to the galley and you make yourself a cup of coffee. And that's exactly... what you are thinking it is. (in-n-out by recycle) And this is the kind of engineering research that we're doing on Space Station. It's needed so that when we go to Mars, we won't run out of water. And of course... not only would you have angry birds if you ran out of water, you'd have "Angry Human Beings", too. I want... to do some physics demonstrations that involve some of the things that you might see in the Angry Birds Game. And, of course, I've got my Angry Bird here, but we need a pig. [...blowing sound...] [...game melody starts...] Well, I'm not very good at art. It's a good thing I decided to be a scientist and an engineer instead of an artist 'cause I'd... I'd probably be starving by now. Ok, Here... here is Pig. And, of course, Pig is the archenemy of Angry Bird. And Angry Bird, had... some eggs! [...piggies oink...] . And Pig... stole the eggs. And don't ask me how... I got the eggs on Sapce Station! [...game melody goes...] . I've got a bungee spread across the hatchway... And this bungee... is kind of like a slingshot. And I'm gonna show... the trajectory... that Red Bird is gonna have when I fire him with this orbital slingshot. [...whistling melody...] . Launching... Red Bird into the space... Well.. hey! we're already in the space! [...gear tightening...] (springs+Bird screams) Wohoo! Look at that! [bang!] Whoa, all..the way down! [...whistling melody...] . That's an example of a trajectory. It's straight line... from our perspective here. Gravity... will attract an object if it's moving in a straight line, and it will no longer move in a straight line. It gets bent... and goes in a curved trajectory. And... guess what? Astronauts have to worry about these things because if you're in a rocket, and say... you're trying to get... from one orbit and rendez-vous a space station, you end up going in curved trajectories, and you need to know how to fire your rocket engines so that you can go from where you are to where you want to be. [...game melody goes...] . And if you understand the math, if you understand the physics, it will allow you to go out... and get... a neat job. A job sort of like mine where you're an astronaut and you can fly in space. (So) Learn about these subjects in school. You can also learn about these subjects while you're playing games. (And...) What happens... when... something like an Angry Bird gets their eggs [bang!] gets their eggs stolen by pig? This is all that's left of Pig after Pig got exploded. And we got to see all of this in a weightless environment, which is what the Angry Birds Space game is going to be like with gravity fields from planetary bodies.