It’s officially a stellar week for Elon Musk, the billionaire engineer behind SpaceX, the company that made history Tuesday launching the first private spacecraft bound for the International Space Station.

The rocket, originally set to hit the stratosphere Saturday, might have taken to the sky a few days late, but the excitement Musk expressed on Twitter about the launch extends a victory streak that also includes more earthly passions.

On Monday, Musk tweeted that Tesla – the luxury electric car company he co-founded in Silicon Valley – had reached a “major milestone” by completing crash testing and gaining approval for sale to the public.

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