A SpaceX Dragon cargo resupply spacecraft returned to Earth from the International Space Station Wednesday (Jan. 13), splashing down off the coast of Florida for the first time ever.
The Dragon CRS-21 mission, SpaceX’s 21st space station cargo delivery for NASA, launched Dec. 6, 2020, with 6,400 lbs. (2,903 kilograms) of supplies and science equipment for the seven-person crew of Expedition 64. After a one-day delay due to bad weather at the splashdown zone, the upgraded vehicle autonomously undocked from the space station for the first time on Tuesday (Jan. 12), and it splashed down west of Tampa about 35 hours later, at 8:26 p.m. EST on Wednesday, Jan. 13 (0126 Jan. 14 GMT).
While previous Dragon cargo missions have ended with parachute-assisted splashdowns in the Pacific, the newly upgraded version of SpaceX’s cargo vessel is designed to land in the Atlantic Ocean, closer to the science processing center at NASA’s Kennedy Space Center in Florida.
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The CRS-21 mission was not only the first to land near Florida, it was also the first to autonomously dock at, and undock from, the International Space Station. Previous Cargo Dragons have relied on astronauts operating the station’s Canadarm2 robotic arm to grapple the spacecraft and berth it with the orbiting lab.
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Other space cargo delivery vehicles, like Northrop Grumman’s Cygnus spacecraft and Japan’s H-II Transfer Vehicle, are intentionally destroyed at the end of their missions; space station astronauts fill the capsules with trash, then use Canadarm2 to send them off toward Earth, and they safely burn up in the atmosphere. SpaceX’s Dragon, however, is a reusable spacecraft designed to safely deliver science experiments back to Earth from the space station. The Dragon CRS-21 mission returned with more than 4,400 lbs. (2,000 kg) of “valuable scientific experiments and other cargo,” NASA officials said in a statement.
“The upgraded cargo Dragon capsule used for this mission contains double the powered locker availability of previous capsules, allowing for a significant increase in the research that can be delivered back to scientists,” NASA added. “Some scientists will get their research returned quickly, four to nine hours after splashdown.”
Some of the scientific cargo on board includes engineered heart tissue, organoids grown from human stem cells, biofilms that could corrode stainless steel, zero-g fiber optics and more.
SpaceX is planning to launch its next Dragon cargo resupply mission, CRS-22, in May of this year. The company’s Crew Dragon capsule is currently docked with the space station and is expected to return to Earth with its four-person crew in May as well. The next Dragon launch will be another Crew Dragon, which is scheduled to launch the Crew-2 mission with another four astronauts in March.
Email Hanneke Weitering at firstname.lastname@example.org or follow her on Twitter @hannekescience. Follow us on Twitter @Spacedotcom and on Facebook.