SpaceX, the space exploration company owned by billionaire Elon Musk, has raised $1.9 billion in new money, according to documents filed with regulators on Tuesday. < / P > < p > this financing coincides with SpaceX’s completion of the most remarkable task. This month, SpaceX’s manned dragon spacecraft returned to earth safely. This is also the first time since the termination of the space shuttle program in 2011 that U.S. astronauts have traveled to the international space station on a U.S. spacecraft. NASA has always been an important partner and customer of SpaceX. NASA said recently that it may carry out its first complete space mission with SpaceX on October 23.