International Space Station

This photo provided by NASA shows the view from NASA's Andrew Morgan's helmet cam as Italian astronaut Luca Parmitano works outside the International Space Station during a spacewalk Saturday. AP hide caption

Boeing, NASA, and U.S. Army personnel work around the Boeing Starliner spacecraft shortly after it landed in White Sands, N.M., Sunday. Bill Ingalls/AP hide caption

A time exposure of the United Launch Alliance Atlas V rocket carrying the Boeing Starliner crew capsule on an flight test to the International Space Station lifts off in Cape Canaveral, Fla., on Friday. Terry Renna/AP hide caption

Astronauts Christina Koch (right) and Jessica Meir pose for a photo on the International Space Station on Oct. 4. NASA moved up the first all-female spacewalk because of a power system failure at the space station. NASA via AP hide caption

India launched a ballistic missile defense interceptor last week — and NASA says it created dangerous debris in orbit. "We have identified 400 pieces of orbital debris from that one event," NASA Administrator Jim Bridenstine said. Handout/Reuters hide caption

While she was working last week, U.S. astronaut Anne McClain realized that she needed a medium-size suit for spacewalking. Dmitri Lovetsky/AP hide caption

The Crew Dragon landed safely in the Atlantic Ocean on Friday morning, with a splashdown at 8:45 a.m. ET, as scheduled. The uncrewed craft had been on a test flight in which it docked with the International Space Station. NASA TV Screenshot by NPR hide caption

In this photo provided by NASA, the SpaceX Crew Dragon is pictured just beside the International Space Station. SpaceX's new crew capsule arrived at the station on Sunday in a remarkable moment for commercial space exploration. NASA via AP hide caption

Astronaut André Kuipers, pictured here after a landing in 2012, accidentally dialed 911 from the International Space Station. Mikhail Metzel/AFP/Getty Images hide caption

Falcon 9 rocket first stage booster experiencing control problems and missing a landing zone at Cape Canaveral, Fla. John Raoux/AP hide caption

NASA astronaut Anne McClain (from left), Russian cosmonaut Oleg Kononenko and David Saint-Jacques of the Canadian Space Agency successfully blasted into space on Monday morning. It is the first mission since an aborted launch in October. Kirill Kudryavtsev/AFP/Getty Images hide caption

Smoke rises as first-stage boosters separate from a Soyuz rocket with a Soyuz MS-10 spacecraft carrying a NASA astronaut and a Russian cosmonaut. The mission was aborted shortly after launch, and the pair returned to Earth safely in an emergency landing. Dmitri Lovetsky/AP hide caption