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In the Milky Way galaxy,
circling a star called the Sun...
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...is a small planet inhabited
by intelligent life.
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00:00:53,887 --> 00:00:57,056
Earthlings have always been
curious creatures.
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00:00:59,643 --> 00:01:05,857
Even as we discovered our own world,
we dreamed of exploring others.
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00:01:07,609 --> 00:01:12,905
Perhaps other beings inhabit planets
around distant stars.
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00:01:13,615 --> 00:01:15,867
If they are sending signals...
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00:01:16,076 --> 00:01:19,537
...we could detect them
with this powerful radio telescope...
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...and maybe send a signal back
across the cosmos.
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00:01:28,005 --> 00:01:31,841
But might we ourselves
leave our home on Earth...
10
00:01:32,009 --> 00:01:34,927
...to explore new worlds?
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00:02:28,899 --> 00:02:34,362
We have already taken the first
small steps outside our planet.
12
00:02:43,622 --> 00:02:49,919
We designed this shuttlecraft to
carry people and cargo up into orbit.
13
00:02:51,255 --> 00:02:54,924
Here, far above
the Earth's atmosphere...
14
00:02:55,133 --> 00:02:58,219
...we're learning how
to live and work in space.
15
00:02:59,054 --> 00:03:01,973
You've got a go
to maneuver the orbiter.
16
00:03:05,769 --> 00:03:09,772
It's doing nose sweep,
going towards the starboard side.
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00:03:11,692 --> 00:03:15,903
The exterior shows just a little
of the expected wear and tear...
18
00:03:16,113 --> 00:03:18,698
...of many trips back and forth.
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00:03:22,619 --> 00:03:25,288
The shuttle is equipped
with a robotic arm...
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00:03:25,497 --> 00:03:29,208
...to move large payloads
ferried up from Earth.
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00:03:29,376 --> 00:03:32,128
Houston, do we have a go
for maneuver?
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00:03:33,088 --> 00:03:35,131
It has lifted from the cargo bay...
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00:03:35,340 --> 00:03:40,136
...a spacecraft which carries
a German telescope named ORFEUS...
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00:03:40,470 --> 00:03:43,598
...and a remotely operated
IMAX camera.
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00:03:43,932 --> 00:03:47,226
Through its lens,
we are seeing as never before...
26
00:03:48,020 --> 00:03:52,315
...the exterior of the shuttle
as it orbits the Earth.
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00:03:57,362 --> 00:04:01,657
Discovery, Houston.
You have a go for release.
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00:04:01,825 --> 00:04:03,618
Copy that.
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00:04:07,748 --> 00:04:12,168
Now the ORFEUS telescope
has been released into orbit.
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00:04:12,377 --> 00:04:17,006
We are riding with it,
floating free in space.
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00:04:18,508 --> 00:04:23,804
Beneath us the shuttle pulls away,
its cargo bay empty.
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00:04:25,432 --> 00:04:27,350
ORFEUS will spend several days...
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00:04:27,517 --> 00:04:31,938
...observing the hottest
and coldest gases in our galaxy.
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00:04:32,147 --> 00:04:34,941
Then the shuttle
will take it back to Earth.
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00:04:41,448 --> 00:04:46,535
Over three decades, we've learned how
to travel back and forth to space...
36
00:04:46,745 --> 00:04:49,455
...and live in low Earth orbit.
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00:04:50,207 --> 00:04:54,335
Now that we have taken these
first steps, are we ready...
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00:04:54,544 --> 00:04:59,840
...to cross the great black void to explore
the other worlds in our solar system?
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00:05:00,300 --> 00:05:05,638
The journey will be hundreds of times
farther than any we have ever undertaken.
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00:05:11,812 --> 00:05:16,148
First, we need to understand
how we adapt to weightlessness.
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00:05:16,316 --> 00:05:18,818
The nine hours of work
scheduled for the blue shift...
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00:05:18,986 --> 00:05:20,653
...one and a half hour for green.
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00:05:20,821 --> 00:05:25,825
Connected by tunnel to the crew cabin,
a laboratory known as Spacelab...
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00:05:26,034 --> 00:05:29,578
...is carried in the cargo bay
on certain flights.
45
00:05:30,497 --> 00:05:33,582
Inside it, scientists
are performing experiments...
46
00:05:33,792 --> 00:05:37,086
...developed by 13 different countries.
47
00:05:40,173 --> 00:05:45,428
Two medical doctors, Norm Thagard
and Roberta Bondar, a Canadian...
48
00:05:45,637 --> 00:05:48,848
...are studying
how our sensory systems behave...
49
00:05:49,016 --> 00:05:51,684
...when introduced to microgravity.
50
00:05:53,020 --> 00:05:57,106
More than half the astronauts
experience space motion sickness...
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00:05:57,274 --> 00:05:59,233
...the first day or two.
52
00:05:59,401 --> 00:06:01,402
We're getting one last calibration, Dave.
53
00:06:01,570 --> 00:06:06,240
German payload specialist Ulf Merbold
is conducting an experiment...
54
00:06:06,450 --> 00:06:08,784
...to find out more about how it happens.
55
00:06:08,952 --> 00:06:10,786
I've got vection.
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00:06:10,954 --> 00:06:15,708
The subject sees one thing,
but he feels another.
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00:06:16,168 --> 00:06:19,754
His brain is confused
by these conflicting messages...
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00:06:19,921 --> 00:06:22,256
...and he becomes disoriented.
59
00:06:25,635 --> 00:06:28,179
Is the spacecraft rotating...
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00:06:28,388 --> 00:06:29,847
...or are we?
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00:06:40,567 --> 00:06:44,403
While Roberta spins,
a tiny camera inside her helmet...
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00:06:44,613 --> 00:06:49,158
...is recording the movements
of her eye as it reacts to the motion.
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00:06:50,535 --> 00:06:55,164
Data are collected at mid-flight,
then again near its end.
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00:06:55,832 --> 00:06:57,792
When the results are compared...
65
00:06:58,001 --> 00:07:01,504
...it becomes clear that the more time
people spend in space...
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00:07:01,671 --> 00:07:06,967
...the more they rely on the visual
sense alone for orientation.
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00:07:07,344 --> 00:07:12,139
But these results tell us only about
how we adapt in the short term.
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00:07:12,557 --> 00:07:18,062
Spores three goes to centrifuge 204.
Make sure it says spore 31 G.
69
00:07:18,230 --> 00:07:19,355
Spores-- Which one?
70
00:07:19,523 --> 00:07:22,399
To find out how we're affected
by longer stays...
71
00:07:22,567 --> 00:07:27,071
...people must live continuously
in a space station.
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00:07:27,322 --> 00:07:31,367
There, we could learn how to maintain
a closed life-support system...
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00:07:31,535 --> 00:07:33,327
...for months or years at a time.
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00:07:33,495 --> 00:07:34,829
One more. Interesting.
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00:07:34,996 --> 00:07:37,414
Recycling is a must.
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00:07:39,501 --> 00:07:42,628
Future astronauts
will be accomplished gardeners.
77
00:07:42,838 --> 00:07:45,714
They will tend small farms in space...
78
00:07:45,882 --> 00:07:49,135
...like this hydroponic garden
at the Kennedy Space Center...
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00:07:49,302 --> 00:07:53,305
...that uses recycled water
and oxygen to grow food.
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00:07:53,890 --> 00:07:57,226
The plants must be kept
free of contamination.
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00:07:57,394 --> 00:08:02,857
Halfway to another planet,
a crop failure would be a disaster.
82
00:08:04,818 --> 00:08:06,443
A hundred and eighty reps left.
83
00:08:06,611 --> 00:08:09,155
Keeping fit is another challenge.
84
00:08:09,364 --> 00:08:13,325
With no body weight to support,
our muscles get weaker.
85
00:08:13,535 --> 00:08:15,661
Bones become brittle.
86
00:08:15,829 --> 00:08:19,498
The longer we stay,
the worse the problems become.
87
00:08:20,417 --> 00:08:24,753
Hey, Bobby! Come on up here.
We're going by Canada.
88
00:08:24,921 --> 00:08:26,922
People traveling to other planets...
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00:08:27,090 --> 00:08:31,177
...will spend years
living in a very confined space.
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00:08:31,553 --> 00:08:34,972
What kinds of emotional stress
will we face?
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00:08:35,640 --> 00:08:39,685
Will we get homesick,
so far from everything we know...
92
00:08:39,853 --> 00:08:45,357
...isolated from family and friends
and the familiar comforts of home?
93
00:09:02,792 --> 00:09:06,795
There she is, John.
Don't run into our home.
94
00:09:06,963 --> 00:09:11,467
Our first journeys to another world
were to our nearby Moon.
95
00:09:13,428 --> 00:09:17,264
Tranquility Base, Houston.
You are cleared for takeoff.
96
00:09:21,144 --> 00:09:24,313
But those round trips
took barely a week.
97
00:09:25,941 --> 00:09:27,900
Today, on the Mir station...
98
00:09:28,109 --> 00:09:32,071
...Russian cosmonauts live in space
for many months.
99
00:09:33,657 --> 00:09:38,869
From time to time, new crews arrive
from Earth in the Soyuz craft.
100
00:09:45,752 --> 00:09:49,338
Now, after almost a year in orbit...
101
00:09:49,547 --> 00:09:52,341
...the cosmonauts
will return home in Soyuz.
102
00:09:59,015 --> 00:10:03,352
And even though they've spent
up to six hours exercising each day...
103
00:10:03,520 --> 00:10:08,857
...when re-exposed to Earth's gravity,
they are temporarily unable to stand up.
104
00:10:10,652 --> 00:10:15,030
Imagine arriving on an alien planet
in this condition.
105
00:10:22,289 --> 00:10:25,165
But what if we could produce
an artificial gravity...
106
00:10:25,333 --> 00:10:28,252
...as we travel to our destination?
107
00:10:28,962 --> 00:10:32,756
In 1968,
Stanley Kubrick's classic film...
108
00:10:32,966 --> 00:10:35,884
...2001: A Space Odyssey...
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00:10:36,094 --> 00:10:40,264
...featured spaceship designs
which would allow us to do this.
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00:10:40,932 --> 00:10:43,809
As the ship spins around,
anyone inside...
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00:10:43,977 --> 00:10:49,106
...feels an outward, or centrifugal,
force that acts like gravity.
112
00:10:50,984 --> 00:10:56,238
In another design, parts of the ship
spin around a stationary hub.
113
00:10:58,325 --> 00:11:00,534
But the rotation of a small spacecraft...
114
00:11:00,702 --> 00:11:03,996
...could make the occupants
disoriented or sick.
115
00:11:04,164 --> 00:11:05,539
We could avoid this...
116
00:11:05,707 --> 00:11:10,044
...if we built a spacecraft
large enough and with a slower spin.
117
00:11:10,420 --> 00:11:13,714
But it would have to be about as long
as the Golden Gate Bridge.
118
00:11:16,051 --> 00:11:19,553
How could we build
such a large ship in space?
119
00:11:21,348 --> 00:11:23,432
To get to Mars, for instance...
120
00:11:23,600 --> 00:11:26,727
...we might design a spacecraft
with two modules...
121
00:11:26,895 --> 00:11:31,774
...one attached to each end
of a very long cable, or tether.
122
00:11:32,192 --> 00:11:37,529
Once underway, the tether would be
extended to separate the two modules.
123
00:11:38,948 --> 00:11:42,451
The whole assembly,
rotating about once per minute...
124
00:11:42,619 --> 00:11:45,954
...could provide
the synthetic gravity needed.
125
00:11:50,960 --> 00:11:55,672
But until recently,
tethers were merely an elegant idea.
126
00:11:55,882 --> 00:11:58,759
The concept would have to be tested.
127
00:11:59,844 --> 00:12:02,012
So far we have good satellite stability.
128
00:12:02,180 --> 00:12:05,766
So an experiment was flown
on the space shuttle.
129
00:12:05,975 --> 00:12:10,854
An Italian satellite was deployed
on a very long tether.
130
00:12:11,022 --> 00:12:13,148
The crew was then to retrieve it.
131
00:12:13,316 --> 00:12:15,692
Let's do it like we simmed it.
132
00:12:16,653 --> 00:12:20,197
You're gonna keep the tether
under control, right? Okay.
133
00:12:20,365 --> 00:12:24,910
At first, the tether behaved
exactly as predicted.
134
00:12:25,078 --> 00:12:28,789
-You don't want to yank on the satellite.
-You've got good tension.
135
00:12:28,957 --> 00:12:33,001
And the Rdot is just oscillating a little bit,
but it's based at zero.
136
00:12:33,169 --> 00:12:34,670
-Slack tether.
-Wait a minute.
137
00:12:34,838 --> 00:12:38,841
But then the reel jammed
and the tether went slack.
138
00:12:39,008 --> 00:12:41,385
Houston, we have slack tether.
Ldot has stopped.
139
00:12:41,553 --> 00:12:45,347
By firing jets on both the orbiter
and the satellite...
140
00:12:45,515 --> 00:12:48,517
...the crew learned that they could
tighten it once again...
141
00:12:48,685 --> 00:12:52,229
...showing that we can
control tethers in space.
142
00:12:52,397 --> 00:12:54,898
Tether's under control.
143
00:12:55,066 --> 00:12:58,527
Unexpected snags are bound to arise.
144
00:12:58,695 --> 00:13:03,031
But we learn from them
and keep moving forward.
145
00:13:05,493 --> 00:13:10,789
To build more reliable spacecraft,
we need light but tough materials.
146
00:13:11,374 --> 00:13:14,751
To test them,
in 1984 we launched a satellite...
147
00:13:14,961 --> 00:13:18,547
...with dozens of materials
attached to its surface...
148
00:13:18,715 --> 00:13:21,842
...exposing them
to the wear and tear of space.
149
00:13:22,010 --> 00:13:25,053
Columbia, Houston.
We have a tally-ho on LDEF.
150
00:13:25,221 --> 00:13:29,975
We left it in orbit for six years,
long enough for an interplanetary trip.
151
00:13:30,143 --> 00:13:31,393
Ready to go get it?
152
00:13:31,561 --> 00:13:34,980
Then the shuttle retrieved it
and took it back to Earth.
153
00:13:37,609 --> 00:13:42,154
We found a wealth of information
embedded in these panels.
154
00:13:42,322 --> 00:13:43,405
Splatters.
155
00:13:43,573 --> 00:13:45,407
As the microscopes reveal...
156
00:13:45,617 --> 00:13:49,119
...the vacuum of space
is anything but empty.
157
00:13:49,287 --> 00:13:51,371
This pattern, I don't know what this is.
158
00:13:51,539 --> 00:13:54,541
A continuous bombardment
of micrometeorites...
159
00:13:54,751 --> 00:13:57,002
...pitted the surfaces with craters.
160
00:14:11,309 --> 00:14:15,521
But the most serious hazard in space
is radiation.
161
00:14:17,315 --> 00:14:20,567
As the shuttle hangs suspended above
the Earth's horizon...
162
00:14:20,777 --> 00:14:24,780
...we see only the lights
of its cargo bay in the darkness.
163
00:14:25,323 --> 00:14:30,661
But we can't see the harmful cosmic
radiation that is everywhere here.
164
00:14:31,579 --> 00:14:33,664
High-energy charged particles...
165
00:14:33,831 --> 00:14:36,917
...are streaming out from the Sun
and other stars.
166
00:14:38,503 --> 00:14:41,421
On Earth, we are protected
by the atmosphere...
167
00:14:41,631 --> 00:14:44,424
...and the surrounding magnetic field.
168
00:14:44,801 --> 00:14:49,137
In space, the radiation can penetrate
the walls of our craft.
169
00:14:51,891 --> 00:14:56,353
A Japanese x-ray satellite reveals
vast clouds of radiation...
170
00:14:56,563 --> 00:14:58,313
...erupting from the Sun.
171
00:14:58,815 --> 00:15:00,482
On interplanetary trips...
172
00:15:00,692 --> 00:15:03,986
...we'll have to retreat
to heavily shielded onboard shelters...
173
00:15:04,153 --> 00:15:06,697
...whenever solar storms are sighted.
174
00:15:10,493 --> 00:15:14,121
Most of the planets are too hostile
for people to visit.
175
00:15:14,330 --> 00:15:16,957
But that doesn't stop us
from exploring them.
176
00:15:17,125 --> 00:15:20,919
Okay, understand. We have a go
for deploy, so we're starting out.
177
00:15:21,087 --> 00:15:24,506
Five, four, three...
178
00:15:24,674 --> 00:15:28,468
...two, one, mark.
179
00:15:28,636 --> 00:15:30,846
-Do we have motion?
-I see motion.
180
00:15:31,014 --> 00:15:35,350
It's stable? It's clear of the ASE.
181
00:15:35,518 --> 00:15:37,894
Where humans cannot safely go...
182
00:15:38,062 --> 00:15:41,815
...we send remotely controlled
robot explorers.
183
00:15:42,025 --> 00:15:43,567
Commanding them from Earth...
184
00:15:43,735 --> 00:15:49,406
...we use their electronic eyes and sensors
to explore the alien landscape.
185
00:15:53,244 --> 00:15:56,872
In 1989, the Galileo spacecraft...
186
00:15:57,040 --> 00:16:00,042
...began a five-year journey to Jupiter...
187
00:16:00,209 --> 00:16:03,670
...the largest planet in our solar system.
188
00:16:04,339 --> 00:16:07,382
Galileo just kind of dissolves out
into nothingness...
189
00:16:07,550 --> 00:16:10,218
...as it goes into the darkness of space.
190
00:16:10,386 --> 00:16:13,889
And that's the last we saw of it.
191
00:16:16,100 --> 00:16:20,937
Early images of Jupiter
were sent back to Earth in 1979...
192
00:16:21,105 --> 00:16:25,025
...by two robot probes named Voyager.
193
00:16:25,193 --> 00:16:29,863
This was our first opportunity
to marvel at its Great Red Spot...
194
00:16:30,031 --> 00:16:32,991
...three times the size of Earth.
195
00:16:35,244 --> 00:16:37,287
The molecular building blocks for life...
196
00:16:37,455 --> 00:16:41,583
...may be swirling within Jupiter's
turbulent atmosphere.
197
00:16:41,751 --> 00:16:44,294
If Galileo's probe confirms this...
198
00:16:44,462 --> 00:16:49,466
...we should gain new insights
into the origins of life.
199
00:16:55,556 --> 00:17:01,019
Though it is our nearest planetary neighbor,
Venus was always a mystery.
200
00:17:01,187 --> 00:17:05,732
Thick cloud layers
blocked our view of its surface.
201
00:17:06,442 --> 00:17:11,029
Then we sent a spacecraft
named Magellan to orbit the planet.
202
00:17:11,197 --> 00:17:15,158
Its radar eyes
could see through the clouds.
203
00:17:15,326 --> 00:17:17,786
Magellan collected so much data...
204
00:17:17,954 --> 00:17:23,458
...that we can now explore the surface
as if we were actually there.
205
00:17:23,626 --> 00:17:27,087
We begin 60,000 feet up.
206
00:17:33,469 --> 00:17:36,596
To help scientists
recognize its features...
207
00:17:36,764 --> 00:17:42,102
...a computer has exaggerated
the height of the terrain 10 times.
208
00:17:47,066 --> 00:17:50,026
Perhaps these pancake domes...
209
00:17:50,194 --> 00:17:55,741
...were caused by lava pushing through
weak spots in the surface.
210
00:18:15,511 --> 00:18:19,181
These craters,
some the size of Connecticut...
211
00:18:19,348 --> 00:18:23,727
...were made by collisions
with comets and asteroids.
212
00:18:24,520 --> 00:18:30,233
On Earth, ancient craters like these
have been eroded by wind and water.
213
00:18:31,110 --> 00:18:34,988
But there is little wind and no water here.
214
00:18:35,239 --> 00:18:39,743
Venus swelters beneath a thick atmosphere
of carbon dioxide...
215
00:18:39,911 --> 00:18:42,245
...which acts like a greenhouse:
216
00:18:42,413 --> 00:18:48,585
It allows sunlight to filter in,
but then traps the heat inside.
217
00:18:48,878 --> 00:18:53,799
The surface temperature
is hot enough to melt lead.
218
00:19:05,353 --> 00:19:09,940
In the distance,
the great Gula Mons volcano.
219
00:19:24,705 --> 00:19:30,752
We are now soaring
more than 250,000 feet above the surface.
220
00:19:30,920 --> 00:19:34,923
The long, smooth strips
that now and then cross our path...
221
00:19:35,091 --> 00:19:40,428
...are small portions of the surface
that Magellan's radar did not scan.
222
00:19:58,072 --> 00:20:03,034
The Magellan craft has shown us
the fantastic surface of an alien planet...
223
00:20:03,202 --> 00:20:06,705
...where no human
could ever hope to land.
224
00:20:07,832 --> 00:20:13,461
But there is another world
in our solar system that people can visit.
225
00:20:19,802 --> 00:20:23,972
Future generations of explorers
will walk upon Mars.
226
00:20:24,140 --> 00:20:25,307
Do you know what that is?
227
00:20:25,474 --> 00:20:28,977
To prepare the way for them,
we could send a robot like this...
228
00:20:29,145 --> 00:20:31,897
...to scout a landing site.
229
00:20:33,482 --> 00:20:38,528
We might dispatch a whole flock
of these helpers to explore the terrain.
230
00:20:40,990 --> 00:20:44,451
Unlike us,
they are almost immune to radiation...
231
00:20:44,619 --> 00:20:47,162
...and need no air or water.
232
00:20:47,330 --> 00:20:49,998
And they never get homesick.
233
00:20:52,418 --> 00:20:55,003
Robots like this Russian Mars rover...
234
00:20:55,171 --> 00:20:57,839
...being tested
in Death Valley, California...
235
00:20:58,007 --> 00:21:01,051
...have already been programmed
for difficult tasks...
236
00:21:01,218 --> 00:21:04,346
...like negotiating rugged terrain.
237
00:21:05,598 --> 00:21:10,310
More elaborate versions
could help us construct a Mars base.
238
00:21:11,979 --> 00:21:15,190
But operating them will be a challenge.
239
00:21:15,358 --> 00:21:17,859
At the speed of light,
a single command...
240
00:21:18,027 --> 00:21:23,698
...takes up to 20 minutes
to travel from Earth to Mars.
241
00:21:30,748 --> 00:21:35,251
If there is or ever has been life
somewhere else in the solar system...
242
00:21:35,419 --> 00:21:38,588
...Mars is a good place to look for traces.
243
00:21:38,756 --> 00:21:43,009
A great rift valley
splits open the Martian plain.
244
00:21:43,177 --> 00:21:46,179
It is as long as the entire United States.
245
00:21:55,940 --> 00:21:58,817
We are now descending
from 40,000 feet...
246
00:21:58,985 --> 00:22:03,238
...into a part of the valley
known as Candor Chasma.
247
00:22:03,739 --> 00:22:08,827
It is five times deeper
than the Earth's Grand Canyon.
248
00:22:09,161 --> 00:22:13,081
The height of the terrain
has not been exaggerated.
249
00:22:13,249 --> 00:22:16,376
This is how it really looks.
250
00:22:23,217 --> 00:22:28,096
Life as we know it
must have liquid water to develop.
251
00:22:29,098 --> 00:22:33,601
Water may have flowed
through these canyons long ago.
252
00:22:33,936 --> 00:22:36,730
Perhaps it nourished life.
253
00:22:46,490 --> 00:22:51,286
Fossil life forms may lie exposed
on the floor of these canyons.
254
00:22:51,454 --> 00:22:54,789
If we find any,
it would be our first proof...
255
00:22:54,957 --> 00:22:58,376
...that life has existed beyond Earth.
256
00:23:02,882 --> 00:23:07,052
It would mean that life
probably is abundant in our galaxy...
257
00:23:07,219 --> 00:23:11,848
...and awaiting discovery
in the universe beyond.
258
00:23:17,772 --> 00:23:21,483
Today, Mars is a frozen world.
259
00:23:21,650 --> 00:23:26,321
The average temperature here
is lower than at the Earth's South Pole.
260
00:23:26,489 --> 00:23:30,033
But long ago,
when water may have flowed here...
261
00:23:30,201 --> 00:23:32,660
...it must have been warmer.
262
00:23:34,914 --> 00:23:38,458
We don't know
why Mars turned so cold...
263
00:23:38,626 --> 00:23:42,879
...but perhaps it could be made
to change once again.
264
00:23:43,047 --> 00:23:47,008
Could future generations
somehow transform Mars...
265
00:23:47,176 --> 00:23:51,012
...into an Earth-like world
where people could live?
266
00:23:55,559 --> 00:23:59,562
To do it, we might imagine somehow
raising the temperature...
267
00:23:59,730 --> 00:24:04,150
...to build up the atmosphere
and melt the ice caps.
268
00:24:06,570 --> 00:24:10,031
This would create lakes and rivers.
269
00:24:12,201 --> 00:24:17,622
Then we could introduce plants
to fill the air with oxygen.
270
00:24:19,208 --> 00:24:22,961
Animals and people
could now breathe the air.
271
00:24:23,129 --> 00:24:27,382
A new world might be ready
for us to colonize.
272
00:24:29,593 --> 00:24:33,054
What would life be like on Mars?
273
00:24:35,224 --> 00:24:39,060
Perhaps we could build farms and cities.
274
00:24:42,565 --> 00:24:47,110
Or perhaps we will leave Mars
as we found it.
275
00:24:52,241 --> 00:24:56,411
Those decisions will be made
by our descendants.
276
00:24:56,620 --> 00:25:02,083
If terraforming is even possible,
it would take thousands of years.
277
00:25:03,043 --> 00:25:05,920
By then, we may have
left our solar system...
278
00:25:06,088 --> 00:25:09,174
...to explore the stars beyond.
279
00:25:11,760 --> 00:25:16,723
Though it would take about 100,000 years
to reach them with present technology...
280
00:25:16,891 --> 00:25:20,894
...future generations may travel faster.
281
00:25:22,104 --> 00:25:28,109
For the present, we must use telescopes
to explore the stars.
282
00:25:30,613 --> 00:25:33,823
Now, we are about to launch
into space...
283
00:25:33,991 --> 00:25:38,244
...an instrument that will allow us to look
to the farthest reaches of the universe...
284
00:25:38,412 --> 00:25:42,165
...and back in time almost to its birth.
285
00:25:42,333 --> 00:25:43,708
One more foot.
286
00:25:43,876 --> 00:25:46,794
This is the Hubble Space Telescope.
287
00:25:46,962 --> 00:25:48,463
Keep coming.
288
00:25:48,631 --> 00:25:51,799
Once in orbit above
the shimmer of Earth's atmosphere...
289
00:25:51,967 --> 00:25:56,221
...it will see 10 times farther
than telescopes on the ground.
290
00:25:56,388 --> 00:25:58,264
And down.
291
00:25:59,975 --> 00:26:04,646
Astronauts Kathy Sullivan,
Loren Shriver and Bruce McCandless...
292
00:26:04,813 --> 00:26:08,524
...have come here to the Lockheed
Vehicle Assembly facility...
293
00:26:08,692 --> 00:26:10,193
...for a final inspection.
294
00:26:10,361 --> 00:26:13,947
That's the socket in the MLI
that you put the pre-load tool in...
295
00:26:14,114 --> 00:26:15,782
...once you've got the door open...
296
00:26:15,950 --> 00:26:19,619
...and just crank it over center
so it'll stay open.
297
00:26:27,419 --> 00:26:30,296
Hello, hello, hello. Howdy.
298
00:26:30,714 --> 00:26:31,756
Morning.
299
00:26:31,924 --> 00:26:35,802
Family and friends gather for the launch
at the Kennedy Space Center.
300
00:26:36,845 --> 00:26:39,514
Among them is Dr. Lyman Spitzer...
301
00:26:39,723 --> 00:26:44,477
...who first proposed the idea
for a space telescope in 1946.
302
00:26:44,645 --> 00:26:47,981
This is a tremendous milestone
today for me.
303
00:26:48,190 --> 00:26:50,149
Very exciting, very exciting.
304
00:26:50,317 --> 00:26:55,738
I suggested a telescope of this general
nature would be very helpful to astronomy.
305
00:26:55,906 --> 00:26:59,659
And the idea finally took hold
among astronomers...
306
00:26:59,827 --> 00:27:04,247
...and then among other people
and finally, even in Congress.
307
00:27:04,415 --> 00:27:05,957
And off it goes.
308
00:27:06,917 --> 00:27:12,255
T-minus 10, go for main engine start.
We are go for main engine start.
309
00:27:12,464 --> 00:27:16,968
Five, four, three, two, one....
310
00:27:17,177 --> 00:27:20,263
And liftoff of the space shuttle Discovery.
311
00:27:49,418 --> 00:27:51,252
Once Hubble is deployed...
312
00:27:51,420 --> 00:27:54,422
...astronomers on the ground
will be able to direct its eye...
313
00:27:54,590 --> 00:27:58,634
...to any region of the universe
they wish to observe.
314
00:27:59,636 --> 00:28:03,931
-Give you a payload ID of one.
-Discovery, we'd like you to go free drift.
315
00:28:04,099 --> 00:28:09,854
While pilot Charlie Bolden, on the left,
maintains the shuttle's precise position...
316
00:28:10,022 --> 00:28:13,983
...astronomer Steve Hawley
prepares to perform the deployment.
317
00:28:14,693 --> 00:28:17,362
Discovery, go for Hubble release.
318
00:28:18,614 --> 00:28:21,449
Hawley releases the telescope.
319
00:28:23,118 --> 00:28:26,454
Then, very slowly and carefully...
320
00:28:26,705 --> 00:28:28,623
...retracts the arm.
321
00:28:37,424 --> 00:28:42,095
The sky and sea of Earth,
reflected in its door...
322
00:28:42,262 --> 00:28:44,597
...the Hubble Space Telescope...
323
00:28:44,765 --> 00:28:49,644
...the creation of 10,000 people,
is launched at last.
324
00:28:50,646 --> 00:28:55,983
It will remain here for many years,
sending images back to Earth.
325
00:28:56,735 --> 00:29:00,571
Shuttle crews will visit Hubble
on regular service calls...
326
00:29:00,781 --> 00:29:04,283
...to replace and upgrade its parts.
327
00:29:11,417 --> 00:29:13,084
Yeah, it looks good.
328
00:29:13,252 --> 00:29:16,546
I don't see any motion at all in there.
329
00:29:16,755 --> 00:29:18,506
Hubble is open for business.
330
00:29:18,674 --> 00:29:22,677
I wish you guys had been here to see it,
because you'll never believe it.
331
00:29:22,845 --> 00:29:25,012
Well, superb is an understatement.
332
00:29:25,180 --> 00:29:28,266
Residuals were at .02 and .01.
333
00:29:28,434 --> 00:29:31,727
The telescope would reveal
objects in detail...
334
00:29:31,895 --> 00:29:34,647
...never before seen.
335
00:29:38,694 --> 00:29:40,778
But there was a problem:
336
00:29:40,946 --> 00:29:46,075
A flaw was found in the shape
of the telescope's primary mirror.
337
00:29:48,036 --> 00:29:51,038
A repair would be necessary.
338
00:29:51,457 --> 00:29:53,749
As part of the regular service call...
339
00:29:53,917 --> 00:29:58,212
...another crew would make
the repairs three years later.
340
00:30:01,925 --> 00:30:03,342
Endeavour,
you've got a go for capture.
341
00:30:03,510 --> 00:30:07,680
First, the crew would
have to recapture the telescope.
342
00:30:07,848 --> 00:30:12,894
Houston, Endeavour, the right-hand
solar array, as we can see it, is....
343
00:30:13,061 --> 00:30:17,899
One side of it is bent way over,
so clearly we have a dynamic situation.
344
00:30:18,066 --> 00:30:20,860
There's a problem
with one of the solar panels...
345
00:30:21,028 --> 00:30:24,155
...that provide electrical power
to the telescope.
346
00:30:24,323 --> 00:30:29,285
Looks like the outer bi-stem
has a kink in it and is twisted...
347
00:30:29,453 --> 00:30:33,789
...90-plus degrees clockwise
there at the kink.
348
00:30:33,957 --> 00:30:37,084
Once the telescope
is secured in the cargo bay...
349
00:30:37,252 --> 00:30:41,589
...the astronauts will move outside
for a closer inspection.
350
00:30:42,299 --> 00:30:46,427
So begins the most ambitious
and difficult service mission...
351
00:30:46,595 --> 00:30:48,346
...ever attempted.
352
00:30:50,432 --> 00:30:54,435
Payload commander Story Musgrave
and astronomer Jeff Hoffman...
353
00:30:54,603 --> 00:30:57,021
...are both veteran spacewalkers.
354
00:30:57,189 --> 00:30:59,690
Story is not built like the rest of us.
355
00:30:59,858 --> 00:31:03,861
Most of us just float under the hut,
and Story has to screw himself in.
356
00:31:04,029 --> 00:31:09,492
If you're a person that gets claustrophobia,
this is not the business you wanna get into.
357
00:31:09,660 --> 00:31:12,912
They'll depressurize here in the airlock...
358
00:31:13,080 --> 00:31:14,288
...then go to work.
359
00:31:16,708 --> 00:31:20,002
It had been planned
that the crew replace the solar panels...
360
00:31:20,170 --> 00:31:22,338
...as part of the regular service.
361
00:31:22,506 --> 00:31:27,677
But now, the twisted panel cannot
be safely stowed in the cargo bay.
362
00:31:27,844 --> 00:31:30,763
They have no choice
but to throw it overboard.
363
00:31:30,931 --> 00:31:34,141
Mission Specialist
Kathy Thornton will do it.
364
00:31:34,309 --> 00:31:38,521
-Okay, they say you've got a go for release.
-Okay, no hands.
365
00:31:43,986 --> 00:31:48,573
Such a large object floating in space
can pose a hazard to other spacecraft.
366
00:31:49,157 --> 00:31:51,492
So bursts from the shuttle jets are fired...
367
00:31:51,660 --> 00:31:54,370
...directly at the solar panel
to make it spin.
368
00:31:59,167 --> 00:32:02,670
The motion will speed up its descent
to the Earth's atmosphere...
369
00:32:02,838 --> 00:32:05,089
...where it will burn up.
370
00:32:07,926 --> 00:32:09,677
There it goes.
371
00:32:16,935 --> 00:32:19,854
Almost like a bird. Look at it.
372
00:32:21,148 --> 00:32:22,356
It's quite a sight.
373
00:32:22,524 --> 00:32:25,651
Now, work on the telescope can resume.
374
00:32:25,819 --> 00:32:31,198
Okay, coming straight on up.
Looking real good. I'm gonna let go.
375
00:32:31,366 --> 00:32:33,701
Okay, take me away.
376
00:32:34,119 --> 00:32:36,746
Just come right up easy,
just like you're doing.
377
00:32:36,913 --> 00:32:39,707
Bring the forward up a little more.
378
00:32:40,667 --> 00:32:44,420
It's difficult to maneuver bodies
and equipment unassisted.
379
00:32:46,965 --> 00:32:50,051
The repair of the telescope
would be almost impossible...
380
00:32:50,218 --> 00:32:52,219
...without the help of the shuttle's arm.
381
00:32:54,473 --> 00:32:59,685
It is controlled from inside
by Swiss astronaut Claude Nicollier...
382
00:32:59,853 --> 00:33:03,648
...while Ken Bowersox,
the pilot, acts as lookout.
383
00:33:03,815 --> 00:33:05,900
Just keep coming up, Claude.
384
00:33:06,068 --> 00:33:09,695
-Stop. Stop.
-Brake's on.
385
00:33:10,364 --> 00:33:14,408
I'm not even pulling it,
I'm just coaxing it with my fingertips.
386
00:33:14,576 --> 00:33:18,913
The new wide-field planetary camera
will tell us more about the size...
387
00:33:19,081 --> 00:33:22,583
...of the universe and how rapidly
it is expanding.
388
00:33:22,751 --> 00:33:23,793
Here we go.
389
00:33:23,960 --> 00:33:27,254
The crew lifts it up with great care.
390
00:33:27,422 --> 00:33:32,343
The tiniest bump could damage
its delicate parts.
391
00:33:37,432 --> 00:33:40,267
The astronaut teams alternate each day...
392
00:33:40,435 --> 00:33:44,188
...spending up to six hours
in the cold vacuum outside.
393
00:33:44,356 --> 00:33:47,566
Okay, I'm gonna slip over.
You've got another foot to keep coming up.
394
00:33:47,734 --> 00:33:49,777
Keep coming up. Coming up. Coming up.
395
00:33:49,945 --> 00:33:52,988
All of their tools must be tethered
to the workstation...
396
00:33:53,156 --> 00:33:55,366
...to keep them
from floating off into space.
397
00:33:55,534 --> 00:33:59,120
Endeavour, Houston for Story.
You've got a go to open the doors.
398
00:33:59,287 --> 00:34:01,205
Okay. Swing it.
399
00:34:04,501 --> 00:34:09,380
After five days of intensive work
and many dazzling accomplishments...
400
00:34:09,548 --> 00:34:15,219
...the astronauts are now ready to install
the critical corrective-optics package.
401
00:34:15,387 --> 00:34:17,972
It's a kind of contact lens...
402
00:34:18,140 --> 00:34:21,642
...designed to bring Hubble's
giant eye into focus.
403
00:34:21,810 --> 00:34:23,644
Pitch up a little.
404
00:34:23,812 --> 00:34:25,271
If it succeeds...
405
00:34:25,439 --> 00:34:30,025
...we will be able to look back
to the edge of time.
406
00:34:34,740 --> 00:34:35,990
Good work, guys.
407
00:34:36,158 --> 00:34:39,160
The service and repair are now complete.
408
00:34:39,327 --> 00:34:42,329
The mission drew upon
every skill we have learned...
409
00:34:42,497 --> 00:34:46,000
...throughout three decades
of work in space.
410
00:34:47,419 --> 00:34:51,297
Whether repairing a telescope,
assembling a space station...
411
00:34:51,465 --> 00:34:54,175
...or building a base on a distant planet...
412
00:34:54,342 --> 00:34:57,720
...we must rely upon the teamwork
of humans and machines...
413
00:34:57,888 --> 00:35:03,684
...if we are to succeed in this challenging
new environment away from Earth.
414
00:35:07,063 --> 00:35:09,648
Endeavour, you've got a go for release.
415
00:35:34,382 --> 00:35:36,884
The Cape of Good Hope beneath it...
416
00:35:37,052 --> 00:35:42,932
...the space telescope is now poised
to begin a new era of exploration.
417
00:35:49,856 --> 00:35:52,066
One of the astonishing discoveries...
418
00:35:52,234 --> 00:35:56,320
...is a first close look at an enormous
and very unstable star...
419
00:35:56,488 --> 00:35:58,614
...we call Eta Carinae.
420
00:35:58,782 --> 00:36:02,618
Four million times
more luminous than our Sun...
421
00:36:02,786 --> 00:36:06,872
...its last outburst was seen in 1841.
422
00:36:07,040 --> 00:36:12,586
And now Hubble reveals that it has
blown two massive clouds into space.
423
00:36:12,754 --> 00:36:19,093
The clouds contain the heavy elements
essential for the creation of life.
424
00:36:20,136 --> 00:36:22,555
Now, in the heart of the Orion Nebula...
425
00:36:22,722 --> 00:36:25,474
...Hubble reveals a stellar nursery.
426
00:36:25,642 --> 00:36:29,854
Gas and dust are condensing here
to create new stars.
427
00:36:30,021 --> 00:36:31,981
And even more astounding...
428
00:36:32,148 --> 00:36:35,067
...new planets are being born.
429
00:36:35,235 --> 00:36:40,281
Never before seen, the dark material
appears to be a new solar system...
430
00:36:40,448 --> 00:36:43,576
...forming around a young sun.
431
00:36:44,911 --> 00:36:50,583
Hubble has now provided evidence
that planets are common in the universe.
432
00:36:50,750 --> 00:36:53,919
Life may be widespread among them.
433
00:36:57,215 --> 00:37:00,801
Perhaps we will hear a signal.
434
00:37:04,472 --> 00:37:07,474
Our curiosity and our need to progress...
435
00:37:07,642 --> 00:37:09,476
...compel us to move outward...
436
00:37:09,644 --> 00:37:12,313
...to explore the worlds
of our solar system...
437
00:37:12,480 --> 00:37:16,150
...our galaxy, and the universe beyond.
438
00:37:16,318 --> 00:37:19,904
The distances are vast,
the voyage hazardous...
439
00:37:20,405 --> 00:37:23,407
...the destination daunting.
440
00:37:24,075 --> 00:37:26,952
Still, we choose to explore.
441
00:37:27,162 --> 00:37:28,412
What we discover...
442
00:37:28,622 --> 00:37:32,583
...will shape our destiny in space.
443
00:39:46,718 --> 00:39:48,719
[ENGLISH]
38769
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