In order to stay in orbit, the Space Shuttle has to accelerate to around 17,000 miles per hour on its way up there. This amazing photo, shot from the ground, is of the shuttle and its attached fuel tank and boosters hitting mach one- the speed of sound. The cloud surrounding it is a transonic phenomena called a Prandtl-Glauert Cloud. If you ever experience one of those while accelerating in your car, you probably should pull over. image source: [Buttercej via Flickr]
Last Call- Mach 1 Edition
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