China Says Mystery Object Appears to Have Struck Ship That Its Space Station Astronauts Were Supposed to Return Home In
Three astronauts' return from Tiangong was postponed after the Shenzhou-20 spacecraft was suspected to have been struck by orbital debris, highlighting growing space-junk risks.
NASA struggling to execute its planetary defense plan
NASA's Planetary Defense Strategy is facing significant management and resource challenges despite some positive developments in detecting near-Earth objects.
