Meet Rollin' Justin, the human-like robot that astronauts control from space

Denmark astronaut Andreas Mogensen loves space robots.

The International Space Station (ISS) astronaut did a rover experiment from space in 2015, and can't wait to keep going. Mogensen will next control Rollin' Justin, a humanoid hit among ISS astronauts, after his launch that takes place no earlier than Aug. 17.

"It's about planning and executing surface operations using a slew of different robotics," Mogensen told in a Zoom interview Tuesday (July 25). 

SpaceX's forthcoming Crew-7 mission for NASA includes Mogensen, NASA astronaut Jasmin Moghbeli, Japan Aerospace Exploration Agency astronaut Satoshi Furukawa, and Russian cosmonaut Konstantin Borisov of Roscosmos. The quartet will launch from NASA's Kennedy Space Center at 6:56 a.m. EDT (1056 GMT). You can watch the events live at, via NASA Television.

Related: SpaceX's Crew-7 astronaut launch delayed to Aug. 17

Rollin' Justin the robot is a perennial hit among International Space Station crew members, the European Space Agency said. (Image credit: Roger Riedel/DLR)

The six-foot (2-meter) Rollin' Justin is one of four robot concepts for exploring the moon or Mars that Mogensen will investigate sometime during his six-month mission, the European Space Agency astronaut (ESA) explained.

"It's one of the experiments that I'm really looking forward to," Mogensen said, and he added he's been watching closely as other astronauts get their turn. This week, for example, the German space agency (DLR) announced that NASA astronaut Frank Rubio recently rolled the 440-pound (220-kg) Justin around from the ISS.

With Rubio at the controls in the ESA Columbus module, Justin and three other robots explored a Mars-like landscape in Germany. Their sandbox at the German Space Operations Center in Oberpfaffenhofen let everyone practice how to set up an astronaut base on the Red Planet with robots. 

"At the push of a button, (Rubio) could have a robot perform a task completely autonomously," DLR said in a statement. "But the astronaut could also take over the robot as an avatar and carry out individual steps as if with his own hand."

The German Space Agency (DLR) humanoid robot, Rollin' Justin, delivers a simulated Mars rock sample to a lander with help from NASA astronaut Frank Rubio on the International Space Station. (Image credit: DLR)

Rollin' Justin was unveiled to the public in 2008 and his first space partnership was in 2017, with Italian astronaut Paolo Nespoli. Justin has had plenty of planet practice since then. The robot simulated repairs on Mars in 2018 with Germany's Alexander Gerst, for example. 

Justin and the robot's siblings have shown off their skills many times on video: Maintenance tasks like tidying and wiping, or classifying materials by touch. In the far future, these tests could help future humanoids take some easy tasks off astronaut hands to allow crews to focus on science. 

Features of Justin include "compliant, lightweight arms and four-finger hands," according to the robot's DLR specifications. There are many other humanoid robots out there, like NASA's Robonaut 2 that operated for years on the ISS before flying home for repairs, for example. Less human-looking, but no less helpful, are arm-shaped robots like Canada's Canadarm2 and Japan's Kibo on the ISS.

Mogensen's forthcoming experiment follows on from more than 10 years of space-controlled robots with ESA and DLR, starting with NASA astronaut Sunita Williams driving a Lego rover from space in 2012. Mogensen told his own 2015 rover drive, using a more space-like version, was one of the more "fascinating" experiments he performed during his 10-day science mission.

Related: European astronaut uses 'the Force' to control rover from space 

Mogensen praised the force feedback on his controller that let him "feel" his way while moving a ground rover around to do common tasks. "I could feel the resistance, for example, when I was inserting a nail or screw into a hole," he recalled.

The human-robot partnership was not only about putting small pegs into round holes, but it demonstrated "millimeter precision" similar to repairing electric connections, ESA stated of the experiment in which Mogensen participated.

NASA and its Artemis program partners are planning to bring humans to the moon's surface as soon as 2025 or 2026, after the Artemis 2 moon mission with four astronauts does a lunar-circling venture in November 2024 or so. The partners are also working on a moon space station known as Gateway.

It's possible (although not confirmed) that astronauts on Gateway may control rovers and robots on the moon one day. But even if not, a lot of robotics are going to the surface. NASA's Commercial Lunar Payload Services (CLPS) program is just one of many ventures that space agencies and private companies are working on to send moon rovers, landers and other tools.

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at:

Elizabeth Howell
Staff Writer, Spaceflight

Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: