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Originally Posted by Benno18
In the first vid, was that foam falling passed the shuttle right at the start?
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I think it's ice falling from the side of the shuttle. Ice forms because the liquid oxygen is so cold. Several techniques are used to reduce the ice build up but it still happens in places.
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Also do they re-use the rockets?
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They re-use the Solid Rocket Boosters on the side of the Shuttle. They are discarded during the assent and parachute back to splash down in the sea where they are pick up again. By the time the main fuel tank is discarded the orbiter is moving so fast and is so high that the main tank burns up in the atmosphere as it falls back to Earth.
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Just one more, why does the shuttle twist on take off, why not straight up?
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The twist, or Roll and Pitch Program, puts the orbiter on a trajectory that allows it to gather enough speed to reach the desired earth orbit (usually to reach the International Space Station). The Roll and Pitch Program also manoeuvres the shuttle so that the main fuel tank is directly under the orbiter and it's wings are level during assent.