This story was updated at 12:20 p.m. EDT. NEW YORK — For the second time in as many weeks, a NASA space shuttle is set to take flight on top of a jumbo jet, offering an overhead spectacle as it flies ...
Three of the four RS-25 engines powering the Artemis II mission previously flew on NASA’s Space Shuttle fleet. The engines are cooled by liquid hydrogen to prevent the nozzle from melting from the ...