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NASA and Royal Mail answer: How much would it cost to send a letter to Mars?

4 December 2015 Last updated at 15:59 GMT

Ever wondered how much money it would cost to send a letter to Mars?

Well a five-year-old boy from Lancashire, who dreams of becoming an astronaut, has found out...

Oliver wrote to Royal Mail asking how much it would be to send a Christmas card to the red planet.

Staff, with the help of Nasa Kennedy Space Centre in Florida, told Oliver that a letter with a "normal" weight would cost £11,602.25 to send the 567 million kilometres from Earth to Mars and back.

Jenny explains...