1
00:00:00,550 --> 00:00:01,590
MIRA: Got it—!

2
00:00:01,750 --> 00:00:03,350
THEO: No, I've got—!

3
00:00:03,600 --> 00:00:05,040
MIRA: …Where'd it go?

4
00:00:07,250 --> 00:00:08,584
Astronauts float.

5
00:00:08,584 --> 00:00:11,330
But almost nobody can tell you why.

6
00:00:12,050 --> 00:00:14,175
Surprise: gravity is still there.

7
00:00:14,175 --> 00:00:19,970
At the space station's height, it's about ninety percent as strong as it is on the ground.

8
00:00:21,300 --> 00:00:23,415
Imagine a falling elevator.

9
00:00:23,415 --> 00:00:27,957
You, the scale, and the floor all drop at the same speed —

10
00:00:27,957 --> 00:00:30,855
so nothing presses on you. You float.

11
00:00:30,855 --> 00:00:32,500
That is microgravity.

12
00:00:33,700 --> 00:00:35,660
The station is falling too —

13
00:00:35,660 --> 00:00:39,650
while racing sideways at about eight kilometers a second.

14
00:00:39,650 --> 00:00:43,850
Fast enough that the ground curves away as fast as it falls.

15
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Fall, and keep missing.

16
00:00:45,460 --> 00:00:46,580
That's an orbit.

17
00:00:47,400 --> 00:00:48,440
MIRA: Caught it!

18
00:00:48,900 --> 00:00:50,340
THEO: Show-off.

19
00:00:50,600 --> 00:00:52,591
Not because gravity is gone.

20
00:00:52,591 --> 00:00:55,080
Because they're falling — together.