Former PayPal founder Elon Musk’s SpaceX is test firing his Falcon 1 rocket this Friday, and hoping for a launch on the 21st or 22nd. The previous attempt blew up, so here’s hoping the second time’s a charm. SpaceX is one of the winners of the NASA COTS competition, which could mean solid income for this private space company if the Falcon 9 is able to deliver test flights and then cargo.