As NASA cancelled the flight, Derrol Nail, the agency’s launch control communicator, explained why.
He said engine 3 did not get the “high accuracy temperature” engineers needed to greenlight the mission.
Mr Nail added that, while the rocket is in a “stable configuration”, crews were “unable to get past the engine bleed that didn’t show the right temperature”.
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Article source: https://www.express.co.uk/news/science/1661875/NASA-rocket-launch-today-artemis-project-schedule-moon-return