Spacewalking astronauts avoid debris as they repair antenna

Astronaut Tom Marshburn replaces a broken antenna (Nasa/AP)

Spacewalking astronauts replaced a broken antenna outside the International Space Station after getting Nasa’s all-clear for orbiting debris.

US astronauts Tom Marshburn and Kayla Barron were supposed to complete the job on Tuesday, but Nasa delayed the spacewalk because of potentially threatening space junk.