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RS-25.

family of liquid propellant rocket engines

‘It Is Time To Fly’: NASA’s First Manned Moon Mission In 50 Years Hurtles Towards Destiny

With four RS-25 engines and two solid rocket boosters generating 8.8 million pounds of thrust, the four Artemis II mission astronauts aboard the Orion spacecraft fixed their gaze towards the heavens Wednesday evening…

Reporting · 1 source · Jul 2, 2026Read it

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About RS-25

The RS-25, also known as the Space Shuttle Main Engine (SSME), is a liquid-fuel cryogenic rocket engine that was used on NASA's Space Shuttle and is used on the Space Launch System.

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