Expedition 31 was the thirty-first long-duration mission to the International Space Station (ISS). Expedition 31 began with the Soyuz TMA-18 undocking in May 2012 with the three new crew members (Dimitri Rezinov, Mike Massimino and Howard Wolowitz). The only known goal of Expedition 31 was for payload specialist Howard Wolowitz to install his team's deep field space telescope on the ISS. The three astronauts were launched from the Baikonur Cosmodrome in Kazakhstan on May 10, 2012. The return was delayed by ten days on October 18, 2012.
The motto on the mission patch reads Magnus Crepitus Theoria, which is Latin for "Big Bang Theory".
The real Expedition 31 was aboard the International Space Station from April 27 to July 1, 2012. Its crew was Oleg Kononenko, André Kuipers, and Don Pettit carried over from Expedition 30, joined by Joseph M. Acaba, Gennady Padalka, and Sergei Revin, who continued into Expedition 32.