Astronaut says goodbye to robot friend

Japanese astronaut Koichi Wakata has been on board the International Space Station for the past 6 months and robot Kirobo has been keeping him company.

But while Koichi landed back on earth yesterday, his little friend had to stay behind.

They'll be re-united when Kirobo returns to earth at the end of the year.

Watch the clip to see them saying farewell.

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