LONDON, ENGLAND - MAY 20: Members of the European Association of Space Explorers (L-R) Ernst Messerschmidt, Sergei Krikalev, Helen Sharman, Claudie Haignere, Anatoli Artsebarski, and Viktor Afanasyev are presented with a cake as they celebrate 25 years since Ms Sharman's mission into space hosted at the Science Museum on May 20, 2016 in London, England. Ms Sharman became the first Briton into space and the first female astronaut to visit the Mir space station in 1991, as part of Project Juno, a UK-Soviet cooperative programme. (Photo by Jack Taylor/Getty Images)
