The Space Launch System is NASA's next-generation rocket, an absolute behemoth that is supposed to get us to Mars.The SLS's booster system was tested for the first time today—basically, the booster was anchored and stabilized in a desert in Utah, where it fired for two consecutive minutes in what's known as a "static test."When the full launch system is eventually ready to go, two boosters will fire, carrying NASA's next-generation Orion space capsule to destinations such as an asteroid or even Mars.Scientists with the mission said all went well: "It looked really clean, we're really excited. It all looked great. Really nice result," an SLS project scientist said on NASA TV.