Eli5: why do space rockets have all the cables still connected during the first seconds of lift off?
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Okay so yes a lot of it is for data and for emergencies but also some rockets (SpaceX Falcon 9 for one) use cryogenic fuel that’s like really freaking cold so that they can fit more fuel in the rocket (colder fuel is more dense). But the problem is that the rocket has to sit in the Florida sun for a long time so all that cold liquid starts to turn back into gas (that’s why you see the clouds coming out of these rockets before launch). So to make sure that they have maximum fuel at launch they have to keep topping up the tank until the last possible second, through these tubes.
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