SpaceX's Crew Dragon capsule on Friday returned home from its historic six-day test flight.
NASA officials confirmed around 2:30 am ET that the capsule successfully detached from the space station. Crew Dragon continued to whirl through orbit and burned its thrusters four times to make a carefully choreographed, gradual descent. The final burn lasted about 15 minutes and helped the vehicle safely slice back through the Earth's thick atmosphere while still traveling thousands of miles per hour.
As the capsule came back to Earth, it deployed a couple of parachutes to brake its speed. A plume of four large, additional parachutes slowed the capsule's drift through the air and it splash down in the Atlantic Ocean around 8:45 am ET.
A recovery ship, called Go Searcher, waited at sea to use a large crane to haul the capsule out of the water. The ship is also equipped with medical quarters and a helicopter pad so that, when crew is involved, it's ready for emergencies.
The capsule launched atop a SpaceX Falcon 9 rocket early Saturday morning. It was carrying about 400 pounds of supplies for the ISS and a space-suited dummy named Ripley, which is "fitted with sensors around the head, neck and spine to record everything an astronaut would experience throughout the mission."
Also aboard Crew Dragon was a "zero-g indicator," or a plush globe otherwise known as Little Earth, that was put on board to demonstrate when Crew Dragon entered microgravity. The toy made appearances in several photos with the astronauts aboard the ISS while they completed routine tasks this week.
Little Earth and the new supplies stayed on the space station, while Ripley and about 300 pounds of return cargo, including a broken spacesuit part, headed back home on Crew Dragon.
Completing the test mission on Friday brought SpaceX's Crew Dragon one step closer to flying humans — and ending the United States' years-long reliance on Russia to fly astronauts to and from the ISS. The capsule is SpaceX's first that is designed to carry humans.
NASA has been unable to fly its own astronauts since the final Space Shuttle retired in 2011, after which the space agency turned to the private sector to develop the next generation of human spaceflight hardware.
SpaceX and Boeing, which is building a vehicle called Starliner, have contracts worth up to $2.6 billion and $4.2 billion, respectively. NASA hoped their spacecrafts would start flying in 2017. Both SpaceX and Boeing have been hampered with delays — but 2019 could be the year they start flying crew.
Government officials still have safety concerns about both spacecrafts, according to a recent Reuters report and documents from NASA's safety advisory panel, all of which will need to be resolved before they can fly humans.
But Elon Musk's space exploration company is one step ahead of Boeing, as it will get key data from this demo mission to make final adjustments ahead of its inaugural crewed flight.
Crew Dragon also aced a key NASA review ahead of launch, and the space agency hasn't yet reported any issues with the mission.
Data from the spacecraft's descent on Friday will be key. The landing technique is unique to SpaceX, as both Russia's veteran Soyuz capsule and Boeing's forthcoming Starliner are designed to land on terra firma rather than at sea.
A final test on Crew Dragon's emergency abort system is scheduled for June. And the first crewed mission, which will carry astronauts Doug Hurley and Bob Behnken, is slated for July, according to NASA's most recent schedule.
The three astronauts on board the ISS — American Anne McClain, Canadian David Saint-Jacques and Russian Oleg Kononenko — were able to get a first glimpse of the SpaceX capsule in microgravity while it was docked at the station this week.
During a video interview with reporters beamed to Earth on Thursday, Saint-Jacques said it looked "like a business class spacecraft."
"Even though it was historic and emotional, we were really heads down making sure we were doing everything step-by-step correctly" when opening Crew Dragon's hatch, Saint-Jacques said, "but I had these moments of, 'oh, a-ha,' with the light of the inside and the view of the beautiful cockpit."
The timeline for the first flight of Boeing's Starliner is not as clear. It's slated to fly an uncrewed demo mission no earlier than April.
Three more crew members — Russian cosmonaut Alexey Ovchinin and NASA astronauts Nick Hague and Christina Koch — are scheduled to arrive at the space station aboard a Russian Soyuz crew capsule next week, on March 14.