The next big thing in space business is tiny rockets

Back in June, NASA tested a booster for the most powerful rocket it has ever tried to build, the Space Launch System (SLS). The booster alone was more than 150 feet long, producing 3.6 million pounds of force, and reaching temperatures of nearly 6,000°F during a ground test in Promontory, Utah. The whole rocket is so expensive it will probably only fly twice in the next four years, if at all.

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