NASA’s Artemis 1 moon rocket begins crucial prelaunch test today

NASA’s Artemis 1 moon rocket will start its “wet dress rehearsal” this evening (June 18), beginning a series of crucial launch countdown tests that will last through Monday (June 20). 

If all goes well, the massive Space Launch System (SLS) rocket and Orion space capsule could be headed for the moon before the end of the summer. 

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