After nine months stranded in space, NASA astronauts Butch Wilmore and Suni Williams will be back on Earth today.

Their stay on the International Space Station was only supposed to last eight days but their mission had to be extended after the spacecraft they arrived on experienced technical issues. 

They are coming home this morning - and are expected to splashdown just before 11am New Zealand time. 

Retired NASA astronaut Clayton Anderson told Andrew Dickens on what they should expect after such a long time in space. 

LISTEN ABOVE

See omnystudio.com/listener for privacy information.