Roving Mars Page #2
This rover also has to be a spacecraft,
60
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45:31,758 -- 00:45:34,818lt actually has to
fly itself from Earth to Mars,
61
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45:34,895 -- 00:45:39,423ln addition, it has to do
the very subtle and quick timing control
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45:39,499 -- 00:45:43,833of all the things that happen
as it enters and lands the vehicle,
63
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45:44,771 -- 00:45:48,263We had to stuff
all that intelligence and capability
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45:48,341 -- 00:45:53,506into that little six-wheel vehicle back there
so that it could get there safely on its own,
65
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45:56,149 -- 00:45:59,209i( Manning)/i l call our spacecraft
the ''origami spacecraft,''
66
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45:59,286 -- 00:46:02,778which means it's really
a complicated series of folds,
67
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46:02,856 -- 00:46:06,485We punched holes in the lander petals
for the wheels to snake through,
68
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46:06,559 -- 00:46:09,756We've had to fold everything
into these complicated shapes
69
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46:09,829 -- 00:46:13,993to get this system
to fit inside this tetrahedron,
70
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46:17,671 -- 00:46:23,303lt's beautiful, but at a price,
and that price, in this case, is complexity,
71
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46:26,579 -- 00:46:29,104i( Squyres)/i There have been
missions to Mars since the '60s,
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46:29,182 -- 00:46:33,812there have been dozens of them,
but two-thirds of those missions failed,
73
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46:33,887 -- 00:46:36,447Mars is a spacecraft graveyard,
74
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46:39,759 -- 00:46:44,287A spacecraft has to travel
about 300 million miles to get to Mars
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46:44,364 -- 00:46:46,924at about 60,000 miles an hour,
76
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46:47,000 -- 00:46:50,060but it still takes seven months to get there,
77
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46:50,136 -- 00:46:52,502Trying to hit our landing sites
from that distance
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46:52,572 -- 00:46:55,473is like shooting a basketball
from Los Angeles to New York
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46:55,542 -- 00:47:00,138and having it go through the hoop
without touching the rim,
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47:05,752 -- 00:47:10,382The smallest mistake on our part
could put the whole mission in jeopardy,
81
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47:10,457 -- 00:47:14,223Two of the last three missions to Mars
were failures,
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47:14,294 -- 00:47:19,823One spacecraft burned in the atmosphere,
the other one crashed on the surface,
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47:19,899 -- 00:47:22,891send two identical spacecraft
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47:22,969 -- 00:47:25,494to double our chances of success,
85
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47:28,274 -- 00:47:32,176The two rovers are named
''Spirit'' and ''Opportunity,''
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47:34,347 -- 00:47:36,178They have very different personalities,
87
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47:36,249 -- 00:47:39,650They did when they were babies,
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"Roving Mars" Scripts.com. STANDS4 LLC, 2024. Web. 28 Mar. 2024. <https://www.scripts.com/script/roving_mars_17189>.
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