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NASA just took a step closer to the moon, executing the second hotfire test of its Space Launch System (SLS) rocket on Thursday, according to the agency's live feed — which streamed on YouTube from 2:30 PM EDT onward (featured below).

The test window was scheduled to open at 3:00 PM EDT, and was set to close at 5:00 PM, sharp. But the hotfire test window was later delayed until 3:45 PM EDT, and eventually ignited at 4:37 PM EDT on Thursday, March 18.

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