SpaceX's pioneering astronauts board the International Space Station

They'll be there for one to three months.

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INTERNATIONAL SPACE STATION - MAY 31: In this screen grab from NASA's feed, NASA astronauts Doug Hurley (R) and Bob Behnken (2R) join NASA astronaut Chris Cassidy (C) and Russian cosmonauts, Anatoly Ivanishin (L) and Ivan Vagner (2L) aboard the International Space Station after successfully docking SpaceX's Dragon capsule May 31, 2020. The docking occurred just 19 hours after a SpaceX Falcon 9 rocket blasted off Saturday afternoon from Kennedy Space Center, the nation’s first astronaut launch to orbit from home soil in nearly a decade. (Photo by NASA via Getty Images)
NASA via Getty Images

Following a dramatic launch, 19-hour voyage and successful docking procedure, pioneering astronauts Robert Behnken and Douglas Hurley have left the Crew Dragon and are now aboard the International Space Station (ISS). The pair emerged from the Crew Dragon capsule at around 1:15 PM ET and were greeted with bear hugs by astronaut Christopher Cassidy and cosmonauts Anatoli Ivanshin and Ivan Vagner. While describing the ride as less smooth than the space shuttle, Hurley said he “couldn’t be happier” about the Crew Dragon’s performance.

The astronauts, who christened the Crew Dragon “Endeavor,” chatted with NASA executives after their arrival. “It’s great to get the United States back in the crewed launch business,” said Hurley. “And we’re just really glad to be onboard this magnificent complex.” Earlier, SpaceX founder Elon Musk said he was “quite overcome with emotion,” adding “this is hopefully the first step on a journey towards civilization on Mars.”

The astronauts’ primary mission, called Demo-2, is a final test of the Crew Dragon’s performance before NASA certifies it for ISS crewed transport missions. However, NASA decided to extend their stay so that Cassidy wouldn’t be the lone US astronaut aboard the ISS.

“The SpaceX crew, with Chris Cassidy already on-board the International Space Station, will be doing experiments on physiology, cardiovascular experiments, physical and life sciences, testing out life support systems … and testing out habitation experiments for our future human space exploration,” NASA’s Kirk Shireman said last month. Behnken might also assist Cassidy on a spacewalk to replace batteries on the ISS’s solar power trusses.

The astronauts are expected to remain on the ISS from one to three months, “based on the readiness of the next commercial crew launch,” NASA said earlier in May. The maximum stay will be will be 110 days due to concerns about how the Crew Dragon’s solar panels will hold up in the challenging conditions of space.

Crew Dragon’s mission will only be complete once the astronaut’s safely arrive back on Earth. That reentry is expected to be a particularly tense phase of the mission, despite extensive testing by SpaceX. “I think it was an argument that the return is more dangerous in some ways than the ascent, so in order to declare victory yet, we need to bring them home safely [and] make sure that we're doing everything we can to minimize that risk of reentry and return," Musk said.

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