Landmark SpaceX crew capsule reaches ISS

The four astronauts who blasted off aboard a SpaceX rocket have now reached the International Space Station -- a historic achievement for space travel, because it's the first full-fledged mission ferrying a crew into orbit on a privately-owned spacecraft.

The SpaceX Crew Dragon capsule, dubbed Resilience, carried three Americans and one Japanese astronaut. They were given a warm greeting by their new crewmates.

Mike Hopkins is commander of the Dragon crew.

“I can't tell you how excited we were when that rocket lifted off the pad. And then the last 27 hours have gone really smooth, actually. And so we are so excited to be here. We are humbled and we are excited to be a part of this great expedition and so we are looking forward to the next six months and can't wait to get started."

They also carried with them a toy of Baby Yoda, the Star Wars character.

The station will be their home for the next six months.

After that, another set of astronauts on a Crew Dragon capsule will make the trip to replace them.

NASA had previously been reliant on Russia's space program since 2011, when the previous U.S. shuttle program ended.