In the past few days, NASA finally rolled its SLS rocket and Orion capsule to the launchpad for the first dress rehearsal countdown in preparation for the Artemis II 10-day manned mission that sometime this spring will slingshot four astronauts around the Moon and back to Earth.
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That dress rehearsal countdown will also include fueling the rocket, which will have to go smoothly before NASA sets a date for the actual launch. At the moment, the agency has a series of launch windows available, from February 6 through April 6. While it hopes to launch early in that window, that hope is not guaranteed. In preparing for the unmanned Artemis I mission in 2022, NASA had to do this practice countdown
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