The Winklevoss twins want to take a trip to outer space, and they’re using bicoin to get there.

Reuters reports that the twins on Wednesday confirmed they’ve used the digital currency to buy tickets for a future journey on board billionaire Richard Branson’s Virgin Galactic commercial spaceflight venture.

Cameron and Tyler Winklevoss are famed for claiming to have created Facebook which was, they claim, stolen by Mark Zuckerberg.