Video: SpaceX launches first mission of 2020 (members only)

NASA Administrator Jim Bridenstine said this week the space agency is not unduly delaying the debut of new SpaceX and Boeing commercial crew capsules as engineers gear up for a challenging rapid-fire sequence of test flights in the next few months, all against the backdrop of in-depth safety reviews before clearing the privately-owned ships to carry astronauts.

Boeing and SpaceX are readying for launch abort tests in the coming weeks to validate the crew escape systems for the new human-rated Starliner and Crew Dragon spaceships, now scheduled to begin ferrying astronauts to the International Space Station in the first half of next year.

With lingering uncertainly about when new commercial crew spaceships will be ready to launch humans, NASA Administrator Jim Bridenstine said Thursday the space agency will replace a Japanese astronaut with a U.S. space flier on the next Russian Soyuz launch to the International Space Station. He added that it remains in NASA’s interests to pay Russia for one or more additional Soyuz seats next year to ensure the station remains continuously staffed with at least one American.