Story highlights "Hello, is this planet Earth?" Peake asks miscellaneous woman

Astronaut tweets apology, saying it was no prank

(CNN) Earth to astronaut Tim Peake: Check the phone number before you dial. Otherwise the person you reach is likely to think you're some kind of nut case.

UK astronaut Tim Peake boards the Soyuz spacecraft.

Peake is a British astronaut who arrived at the International Space Station on December 15. He is spending six months there, conducting scientific experiments.

Recently, he phoned home -- as in Earth -- but got the number wrong.

"Hello, is this planet Earth?" Peake asked.

When he realized he'd misdialed, Peake tweeted his regret.

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