[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:14.35,0:00:16.54,Default,,0000,0000,0000,,Have you ever been floating in a swimming pool,
Dialogue: 0,0:00:16.54,0:00:18.09,Default,,0000,0000,0000,,all comfy and warm, thinking,
Dialogue: 0,0:00:18.09,0:00:20.25,Default,,0000,0000,0000,,"Man, it'd be cool to be an astronaut!
Dialogue: 0,0:00:20.25,0:00:21.71,Default,,0000,0000,0000,,You could float out in outer space,
Dialogue: 0,0:00:21.71,0:00:23.37,Default,,0000,0000,0000,,look down at the Earth and everything.
Dialogue: 0,0:00:23.37,0:00:24.70,Default,,0000,0000,0000,,It'd be so neat!"
Dialogue: 0,0:00:24.70,0:00:26.36,Default,,0000,0000,0000,,Only that's not how it is at all.
Dialogue: 0,0:00:26.36,0:00:27.67,Default,,0000,0000,0000,,If you are in outer space,
Dialogue: 0,0:00:27.67,0:00:28.93,Default,,0000,0000,0000,,you are orbiting the Earth,
Dialogue: 0,0:00:28.93,0:00:31.17,Default,,0000,0000,0000,,it's called free fall.
Dialogue: 0,0:00:31.17,0:00:32.47,Default,,0000,0000,0000,,You're actually falling towards the Earth.
Dialogue: 0,0:00:32.47,0:00:33.89,Default,,0000,0000,0000,,Alright, think about this for a moment.
Dialogue: 0,0:00:33.89,0:00:35.49,Default,,0000,0000,0000,,That's the feeling you get
Dialogue: 0,0:00:35.49,0:00:37.45,Default,,0000,0000,0000,,if you're going over the top of a roller coaster,
Dialogue: 0,0:00:37.45,0:00:40.29,Default,,0000,0000,0000,,going, like, "Whoooooaaaahhhh!"
Dialogue: 0,0:00:40.29,0:00:41.60,Default,,0000,0000,0000,,Only you're doing this the whole time
Dialogue: 0,0:00:41.60,0:00:42.87,Default,,0000,0000,0000,,you're orbiting the Earth
Dialogue: 0,0:00:42.87,0:00:43.49,Default,,0000,0000,0000,,for two,
Dialogue: 0,0:00:43.49,0:00:44.02,Default,,0000,0000,0000,,three,
Dialogue: 0,0:00:44.02,0:00:44.62,Default,,0000,0000,0000,,four
Dialogue: 0,0:00:44.62,0:00:45.15,Default,,0000,0000,0000,,hours,
Dialogue: 0,0:00:45.15,0:00:45.61,Default,,0000,0000,0000,,days,
Dialogue: 0,0:00:45.61,0:00:46.66,Default,,0000,0000,0000,,whatever it takes, right?
Dialogue: 0,0:00:46.66,0:00:48.37,Default,,0000,0000,0000,,So, how does orbiting work?
Dialogue: 0,0:00:48.37,0:00:50.32,Default,,0000,0000,0000,,Let's take a page from Isaac Newton.
Dialogue: 0,0:00:50.32,0:00:51.37,Default,,0000,0000,0000,,He had this idea,
Dialogue: 0,0:00:51.37,0:00:52.44,Default,,0000,0000,0000,,a little mental experiment.
Dialogue: 0,0:00:52.44,0:00:53.90,Default,,0000,0000,0000,,You take a cannon,
Dialogue: 0,0:00:53.90,0:00:54.99,Default,,0000,0000,0000,,you put it on top of a hill.
Dialogue: 0,0:00:54.99,0:00:56.28,Default,,0000,0000,0000,,If you shoot the cannon ball,
Dialogue: 0,0:00:56.28,0:00:57.98,Default,,0000,0000,0000,,it goes a little bit away.
Dialogue: 0,0:00:57.98,0:00:58.77,Default,,0000,0000,0000,,But if you shoot it harder,
Dialogue: 0,0:00:58.77,0:01:01.62,Default,,0000,0000,0000,,it goes far enough so that it lands
Dialogue: 0,0:01:01.62,0:01:03.84,Default,,0000,0000,0000,,a little bit past the curvature of Earth.
Dialogue: 0,0:01:03.84,0:01:04.62,Default,,0000,0000,0000,,Well, you can imagine
Dialogue: 0,0:01:04.62,0:01:06.60,Default,,0000,0000,0000,,if you shot it really, really, really hard,
Dialogue: 0,0:01:06.60,0:01:08.92,Default,,0000,0000,0000,,it would go all the way around the Earth
Dialogue: 0,0:01:08.92,0:01:10.05,Default,,0000,0000,0000,,and come back, boom!
Dialogue: 0,0:01:10.05,0:01:11.89,Default,,0000,0000,0000,,and, like, hit you in the backside or something.
Dialogue: 0,0:01:11.89,0:01:13.11,Default,,0000,0000,0000,,Let's zoom way back
Dialogue: 0,0:01:13.11,0:01:14.63,Default,,0000,0000,0000,,and put you in a little satellite
Dialogue: 0,0:01:14.63,0:01:16.22,Default,,0000,0000,0000,,over the North Pole of the Earth
Dialogue: 0,0:01:16.22,0:01:17.59,Default,,0000,0000,0000,,and consider north to be up.
Dialogue: 0,0:01:17.59,0:01:19.46,Default,,0000,0000,0000,,You're going to fall down and hit the Earth.
Dialogue: 0,0:01:19.46,0:01:23.80,Default,,0000,0000,0000,,But you are actually moving sideways really fast.
Dialogue: 0,0:01:23.80,0:01:24.96,Default,,0000,0000,0000,,So, when you fall down,
Dialogue: 0,0:01:24.96,0:01:26.34,Default,,0000,0000,0000,,you're going to miss.
Dialogue: 0,0:01:26.34,0:01:28.21,Default,,0000,0000,0000,,You're going to end up on the side of the Earth,
Dialogue: 0,0:01:28.21,0:01:29.56,Default,,0000,0000,0000,,falling down,
Dialogue: 0,0:01:29.56,0:01:32.56,Default,,0000,0000,0000,,and now the Earth is pulling you back in sideways.
Dialogue: 0,0:01:32.56,0:01:33.82,Default,,0000,0000,0000,,Alright, and so it's pulling you back in
Dialogue: 0,0:01:33.82,0:01:34.71,Default,,0000,0000,0000,,and you fall down,
Dialogue: 0,0:01:34.71,0:01:36.62,Default,,0000,0000,0000,,and so you miss the Earth again,
Dialogue: 0,0:01:36.62,0:01:38.15,Default,,0000,0000,0000,,and now you're under the Earth.
Dialogue: 0,0:01:38.15,0:01:39.38,Default,,0000,0000,0000,,And the Earth is going to pull you up,
Dialogue: 0,0:01:39.38,0:01:40.91,Default,,0000,0000,0000,,but you're moving sideways still.
Dialogue: 0,0:01:40.91,0:01:42.46,Default,,0000,0000,0000,,So, you're going to miss the Earth again.
Dialogue: 0,0:01:42.46,0:01:43.96,Default,,0000,0000,0000,,Now, you're on the other side of the Earth,
Dialogue: 0,0:01:43.96,0:01:46.69,Default,,0000,0000,0000,,moving upward and the Earth's pulling you sideways.
Dialogue: 0,0:01:46.69,0:01:48.76,Default,,0000,0000,0000,,Alright, so you're going to fall sideways,
Dialogue: 0,0:01:48.76,0:01:51.21,Default,,0000,0000,0000,,but you're going to be moving up and so you'll miss.
Dialogue: 0,0:01:51.21,0:01:53.02,Default,,0000,0000,0000,,And now you're back on top of the Earth again,
Dialogue: 0,0:01:53.02,0:01:54.33,Default,,0000,0000,0000,,over the North Pole,
Dialogue: 0,0:01:54.33,0:01:56.58,Default,,0000,0000,0000,,going sideways and falling down,
Dialogue: 0,0:01:56.58,0:01:57.73,Default,,0000,0000,0000,,and yep, you guessed it.
Dialogue: 0,0:01:57.73,0:02:01.06,Default,,0000,0000,0000,,You'll keep missing because you're moving so fast.
Dialogue: 0,0:02:01.06,0:02:03.48,Default,,0000,0000,0000,,In this way, astronauts orbit the Earth.
Dialogue: 0,0:02:03.48,0:02:05.64,Default,,0000,0000,0000,,They're always falling towards the Earth,
Dialogue: 0,0:02:05.64,0:02:07.31,Default,,0000,0000,0000,,but they're always missing,
Dialogue: 0,0:02:07.31,0:02:09.57,Default,,0000,0000,0000,,and therefore, they're falling all the time.
Dialogue: 0,0:02:09.57,0:02:10.49,Default,,0000,0000,0000,,They feel like they're falling,
Dialogue: 0,0:02:10.49,0:02:12.26,Default,,0000,0000,0000,,so you just have to kind of get over it.
Dialogue: 0,0:02:12.26,0:02:16.40,Default,,0000,0000,0000,,So, technically, if you ran fast enough and tripped,
Dialogue: 0,0:02:16.40,0:02:18.91,Default,,0000,0000,0000,,you could miss the Earth.
Dialogue: 0,0:02:18.91,0:02:20.17,Default,,0000,0000,0000,,But there's a big problem.
Dialogue: 0,0:02:20.17,0:02:24.01,Default,,0000,0000,0000,,First, you have to be going 8 kilometers a second.
Dialogue: 0,0:02:24.01,0:02:26.26,Default,,0000,0000,0000,,That's 18,000 miles an hour,
Dialogue: 0,0:02:26.26,0:02:28.88,Default,,0000,0000,0000,,just over Mach 23!
Dialogue: 0,0:02:28.88,0:02:29.84,Default,,0000,0000,0000,,The second problem:
Dialogue: 0,0:02:29.84,0:02:31.26,Default,,0000,0000,0000,,If you're going that fast,
Dialogue: 0,0:02:31.26,0:02:32.93,Default,,0000,0000,0000,,yes, you would orbit the Earth
Dialogue: 0,0:02:32.93,0:02:34.43,Default,,0000,0000,0000,,and come back where you came from,
Dialogue: 0,0:02:34.43,0:02:36.56,Default,,0000,0000,0000,,but there's a lot of air in the way,
Dialogue: 0,0:02:36.56,0:02:37.98,Default,,0000,0000,0000,,alright, much less people and things.
Dialogue: 0,0:02:37.98,0:02:40.10,Default,,0000,0000,0000,,So, you would burn up due to atmospheric friction.
Dialogue: 0,0:02:40.10,0:02:43.70,Default,,0000,0000,0000,,So, I do not recommend this.