The SpaceX Dragon capsule successfully docked with the International Space Station. Now, it heads back to earth.
With Tuesday's launch of the Dragon space capsule aboard the Falcon 9 rocket, SpaceX made a strong case for the viability of commercial spaceflight. But the craft still has quite a few tests to pass for its mission to be a success.
If all goes well, the first private capsule will dock at the space station Thursday, marking a historic turning point in the use of private space companies. This will help free up NASA for riskier space exploration.