Canada will contribute US$1.4bn to a proposed Nasa space station that will orbit the Moon and act as a base to land astronauts on its surface.
Prime Minister Justin Trudeau said the step would "push the boundaries of innovation".
The space station, called Gateway, is a key element in Nasa's plan to return to the Moon with humans in the 2020s.
As part of the 24-year commitment, Canada will build a next-generation robotic arm for the new lunar outpost.
"Canada is going to the Moon," Mr Trudeau told a news conference at Canadian Space Agency's headquarters near Montreal, according to AFP.
*Canada is going near the Moon.
Previously: Russia Assembles Engineering Group for Lunar Activities and the Deep Space Gateway [soylentnews.org]
China Will Focus on a Lunar Surface Station Rather than a Lunar Orbiting Station [soylentnews.org]
SpaceX's Falcon Heavy Could Launch Japanese and European Payloads to Lunar Orbital Platform-Gateway [soylentnews.org]
Head of Russian Space Agency Roscosmos Wavers on Lunar Orbital Platform-Gateway [soylentnews.org]
Is the Lunar Orbital Platform-Gateway the Right Way to the Moon? [soylentnews.org]