Sean Duffy, the Secretary of Transportation and acting administrator of NASA, appeared on CNBC on Monday to say that SpaceX had fallen behind in its effort to return Americans to the moon with the Artemis program. And SpaceX CEO Elon Musk was not happy about it.

Elon Musk called the transportation secretary ‘Sean Dummy’ on X Tuesday, after Duffy suggested NASA may sideline SpaceX from its moon mission.

Elon Musk lashed out at NASA’s acting chief Sean Duffy, accusing him of “trying to kill NASA” amid a growing feud over the Artemis Moon program and the agency’s decision to invite rival companies like Blue Origin to compete with SpaceX.

SpaceX Chief Executive Elon Musk hurled insults at NASA’s acting administrator a day after complaints SpaceX was behind schedule on its Artemis lander.

Read about the online clash between Elon Musk and acting NASA Administrator Sean Duffy over SpaceX's involvement in the Artemis lunar programme. Understand the tensions and implications for America's space program.

Transportation Secretary Sean Duffy is reportedly in a power struggle with Jared Isaacman, an Elon Musk ally, over who will lead NASA.

The SpaceX boss posted a series of posts on X in response to remarks made by Sean Duffy about the timeline for getting humans back to the moon

Elon Musk 's space technology company, SpaceX, moved Bitcoin for the first time in three months on Oct. 21. As per the on-chain analytics platform Arkham Intelligence, a SpaceX-linked crypto wallet transferred 2,495 Bitcoin worth approximately $268.5 million in the first on-chain transfer since July 24.

Elon Musk's SpaceX has settled a lawsuit filed by the maker of the popular party game Cards Against Humanity over accusations that the space technology company damaged land the card company owns in Te