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You can give British astronaut Tim Peake a wave if you spot the International Space Station in the sky.

Astronomer Marek Kukula from the Royal Observatory Greenwich has been telling Phil Williams how: "There's a great website called meteorwatch.org and it tells you when the ISS is visible from the UK:

"I think every night for the next few nights in the early evening you should have a chance to see it so give Tim a wave is my advice," he said.

Tim Peake has now started his six month mission on the International Space Station.

This clip is originally from the Phil Williams show on Tuesday 15th December 2015