NASA will eventually use the Space Launch System to send humans to Mars — it might even carry a crew the very first time it launches. Unfortunately the world’s most powerful rocket is a tad behind schedule (it was originally supposed to launch this year) and over budget. However, NASA has released an interesting 360-degree video of a hot-fire test of the main RS-25 engine, one of four shown above. From one vantage point, you’re standing in a place you really wouldn’t want to be in person — near the flame trench directly behind the 512,000-pound-thrust rocket.
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