Three days after a trio of space station fliers, a Russian cosmonaut, a German flight engineer and a NASA physician-astronaut rocketed into orbit aboard another Soyuz spacecraft Wednesday, setting off after the lab complex in the first step of a two-day rendezvous.
The Soyuz MS-09/55S's carrier rocket thundered to life and climbed away from Yuri Gagarin's launch pad at the Baikonur Cosmodrome in Kazakhstan at at 7:12:39 a.m. EDT (GMT-4; 5:12 p.m. local time), the moment when Earth's rotation carried the launch site into the plane of the space station's orbit.
Looking on were Jon Huntsman, the U.S. ambassador to Russia, his German counterpart and Sigmund Jaehn, who became the first German in space in 1978 when he represented East Germany aboard the Salyut 6 space station.
Strapped into the crew module's center seat was vehicle commander Sergey Prokopyev, making his first flight, flanked on the left by co-pilot Alexander Gerst, a European Space Agency astronaut, and on the right by Serena Auñón-Chancellor, a NASA astronaut and flight surgeon.
Gerst, a prolific Twitter user who spent 165 days aboard the station in 2014, posted observations all the way up to the moment he boarded the rocket.
"Driving to the rocket, on Gagarin's launch pad," he wrote. "There she is, ready, steaming, alive, in all her beauty. I will need to give her another friendly tap before we climb in. Can't wait to feel those engines in my back."
He did not have long to wait. Live television from inside the cramped capsule showed all three crew members calmly monitoring cockpit displays as the Soyuz accelerated and climbed toward orbit, seemingly relaxed and reassuring flight controllers at the Russian mission control center near Moscow that all was well.
In a first for the Russians, a camera mounted outside on the rocket provided spectacular views as the Earth dropped away and the booster's spent stages were jettisoned, views familiar from U.S. rockets but never seen before during scores of earlier Soyuz launchings.
The workhorse rocket did its job with no apparent problems and eight minutes 45 seconds after liftoff, the Soyuz spacecraft was released to fly on its own, its solar arrays and antennas unfolding as planned.
If all goes well, Prokopyev and Gerst will monitor a carefully planned sequence of rendezvous rocket firings, catching up with the space station Friday and docking at the Earth-facing Rassvet module around 9:07 a.m. They will be welcomed aboard by Expedition 56 commander Drew Feustel, flight engineer Ricky Arnold and cosmonaut Oleg Artemyev.
In a rapid-fire crew rotation that will minimize any disruption to space station research, Prokopyev, Gerst and Auñón-Chancellor are replacing yet another Soyuz crew that returned to Earth Sunday -- Soyuz MS-07/53S commander Anton Shkaplerov, Scott Tingle and Japanese astronaut Norishige Kanai.
The new crew faces a particularly busy first few weeks in orbit with a U.S. spacewalk on tap, the arrivals of Russian and American cargo ships and a full slate of scientific research.
Making her first space flight, Auñón-Chancellor is a veteran NASA flight surgeon who originally was assigned to a mission taking off later this year. She was moved up to the Soyuz MS-09 crew after astronaut Jeanette Epps, one of the original crew members, was unexpectedly bumped from the Prokopyev-Gerst crew in January.
Citing privacy issues, NASA provided no explanation. Epps had no public comment and Auñón-Chancellor would only say she did not expect any problems working through an accelerated training schedule.
"I certainly didn't take part in any of those decisions, (they were) way above my head," she said. "We know this is a dynamic business, and so they told me to prepare and train and get ready for this mission so I said OK, that's my job, that's what I'm going to do. And that's what I'm focusing on."
She credited Gerst with helping her with emergency training in a compressed timeline.
"We wanted to make sure we practiced certain emergency scenarios together as a crew and get the same number of hours that we would have otherwise," she said. "So Alex volunteered his time in Russia to stay a little bit longer and make sure that those drills got done correctly with the right amount of time, and we weren't rushed. But other than that, in all honesty, it really has been smooth."
Auñón-Chancellor should be well suited for life aboard the space station. She spent more than nine months in Star City near Moscow supporting medical operations with space station crew members, two months in Antarctica searching for meteorites as part of a scientific expedition and later served as an aquanaut aboard the Aquarius underwater laboratory.
"Antarctica was fantastic because when I was there I felt like I was not on this planet," she said. "You really feel like you are more isolated in Antarctica than you are on space station. On space station, you can call your family, you can get news uploaded to you, you're very well connected. And down there in Antarctica, you don't feel connected to anything. You learn what's important to you."
She and Gerst were selected as astronauts in the same 2009 class and she had already met Prokopyev during her stint in Moscow before being assigned to the Soyuz MS-09 crew.
"I've known those guys for a while," she said. "We found out we all have very similar sense of humors, which helps a lot, and we grew up in big families. In the past couple of months, our families have spent time together. ... There are so many similarities, even coming from completely different parts of the planet. When you come together, you realize family is family. So it's been really nice to see."