Daily Star's biggest headlines straight to your inbox!Elon Musk hit out at people who "attack space" as he falls behind in the billionaire space race.
The SpaceX boss is a huge proponent of travelling beyond Earth and has even talked about going to Mars and setting up a colony there.
He tweeted: "Those who attack space maybe don't realize that space represents hope for so many people." Musk has long held an ambition for heading to outer space.
On Sunday fellow billionaire rival Sir Richard Branson headed to the edge of space in his Virgin Galactic rocket in what has been dubbed the first-ever commercial space flight.
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