thank you [Music] this is NASA's space Power facility near Cleveland Ohio and it is the world's biggest vacuum chamber it's used to test spacecraft in the conditions of outer space and it does that by pumping out the 30 tons of air in this chamber until there are about two grams left Galileo's experiment was simple took a heavy object and a light one and drop them at the same time to see which fell fastest [Music] now in this case the feathers fell to the ground at a slower rate than the bowling ball because of air resistance
thank you so in order to see the true nature of gravity we have to remove the air [Music] it takes three hours to pump out the 800 000 cubic feet of air from the chamber okay we dropped two military in the last 30 minutes but once it's complete there's a near perfect vacuum inside 6104 manual 10 open station one go for drop PCV 30-1 pressure set point at 240 PSI we are go for drop um nine eight seven six five four cameras on two One release foreign [Music] [Music] nothing [Music] that's just brilliant [Music] he
reasoned that if you couldn't see the background there'd be no way of knowing that the ball and the feathers were being accelerated towards the Earth [Music]
