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beautiful it's a perspective that's

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thrilled astronauts escape everyone else

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peaceful and for over 25 years crunches

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look back and wonder from this unique

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vantage point generating a variety of

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earth imagery produced with motion

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picture and still cameras as well as the

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shuttles onboard video system these

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images provide a visual record of how

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our planet is changing over time and

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along with satellite data offer

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scientists in a number of disciplines is

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when you hook and research tool

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oceanographers can look at currents from

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the right position with respect to Sun a

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detailed cloud patterns are captured for

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meteorologists and geologists can see

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large areas with very high photographic

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resolution this is a almost vertical

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shot of San Francisco as we look down

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you can very easily see the fault line

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so from a geological standpoint this is

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a very very good photograph the Sun

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angle is fairly low and you can see

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exactly where the major minor faults are

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in the San Francisco area astronauts

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begin training in earth observations

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when they entered the space program so

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that by the time they fly they are

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thoroughly familiar with the science and

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photographic techniques involved in the

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effort this enables them to make

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real-time decisions about things from

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orbit including the shattering phenomena

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the original flight plan all those

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events that there cannot be predicted

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engines they just happen it is nice to

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have a crew set of humanized 22 direct

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cameras and instrumentation to those

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sites in a very rapid response and

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that's the value of the human being

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earth observations from the shuttle

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revealed dramatic changes on the face of

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our planet

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this is a view of Lake Chad and

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Mauritania seen over the nose of a

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Gemini spacecraft back in 1966 shuttle

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crews flying over central Africa in the

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nineteen eighty-five timeframe saw like

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Chad looking like this the only

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remaining water in the lake is that

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light gray patch at the upper end of the

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dark zone the SU courses simultaneous

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with the extensive drought conditions in

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central Africa that underlies those very

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pointed human stories that we read about

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the fragility of our atmosphere has

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struck all earth-observing astronauts

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you see how very very thin a little

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coating it is compared to the rest of

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the signs of the planet it's not like

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the peel on a grapefruit or the peel on

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an orange it's not even really like to

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me the shell on an egg for relative

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sizes if anything it's almost as if

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we're covered by that thin little

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membrane between the egg shell and the

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egg itself that's the tiny little

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membrane of air and gases that keeps us

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all healthy a major environmental

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concern today is the large field burning

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and subsequent deforestation going on

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around the world a number of shuttle

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crews have documented this activity

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intent is to recognize that there really

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are no sovereign boundaries in our

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environment but that everyone mankind as