NASA engineers finally tanked the massive Space Launch System rocket with fuel Monday night, getting through most of the last crucial test before its inaugural flight. After reviewing their trove of data from the test, the team will decide this summer’s launch date for the world’s most powerful rocket, part of the first major mission of the Artemis moon program.
Having rolled the fully stacked mega-rocket, with the Orion crew capsule on top, out to the launchpad at Kennedy Space Center in Florida, the SLS team began running through a practice countdown called the “wet dress rehearsal test.” While previous attempts in April foundered thanks to problems with faulty valves,
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