Orion helium leak no threat to Artemis II reentry, but will require redesign

The spacecraft burns hydrazine fuel mixed with an oxidizer, nitrogen tetroxide, to power its main engine and thrusters for in ...

Space historians explain why it took the US more than 50 years to return to the moon

In 1989, President George H.W. Bush announced the Space Exploration Initiative with the goals of going back to the moon "to ...

Amid Artemis II mission, why did it take the US so long to return to the moon?

The Artemis II crew completed a historic lunar flyby this week, becoming the first astronauts in nearly 54 years to visit the ...