SpaceX CEO Elon Musk has tweeted an official photo of the space company's Raptor engine — which will be used for the Starship Mars missions — in action.

In the update, he mentioned that a technical problem caused by engine vibration had been fixed.

This comes amidst assurances from SpaceX’s vice president of commercial sales, Jonathan Hofeller, that the spacecraft's maiden voyage will likely take place in 2021.

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