We can forgive them because it was 1956, but this is a real pedestrian space yarn with a lot of holes in it. It's in the middle of the Cold War and the development of a rocket to the stratosphere is commandeered to test a bomb-to-end-all-bombs. This will create what we in the late 20th Century called detente. Even the crew is ignorant of the whole process, but some government zealots go off half cocked with little regard for the dangers, in order to scare the world out of developing any further weapons, fighting any future wars. Of course, the whole thing has to go off just right, and we know it isn't. Once again we have the obligatory pushy female (a reporter who stows away on the rocket) who pushes everyone's buttons. Just to show you what a progressive time she lives in, she ends up making coffee and sandwiches for the guys. There is the idea that science is advancing too fast. In the end, this is a movie about dealing with the realities of miscalculation. The slipshod methods make this less than it could have been. It does have decent special effects or its time.
Review of Satellite in the Sky
