H. R. MacMillan Space Centre, Space science museum in Vanier Park, Vancouver, Canada.

The H. R. MacMillan Space Centre is a science museum in Vanier Park dedicated to astronomy and space exploration, offering visitors hands-on learning experiences. The building houses a planetarium theater, interactive exhibits, and educational displays that explore topics ranging from planetary science to deep space discovery.

The building was designed by architect Gerald Hamilton in the 1960s for the Centennial Museum, and the planetarium was added to the plans after a donation by lumber magnate H. R. MacMillan. The facility opened on October 28, 1968 as the H.R. MacMillan Planetarium. In the 1990s it was rebranded and took exhibit space in a wing shared with the Museum of Vancouver, and Matsuzaki Wright Architects renovated that space in 1997-98.

The center regularly hosts astronomy talks and workshops that introduce visitors to current discoveries in space exploration and celestial observation. These programs help people connect with what scientists are learning about the cosmos.

The Space Centre occupies one wing of the Centennial Museum Building, which it shares with the Museum of Vancouver; the Gordon MacMillan Southam Observatory stands next to the building. The site is in Vanier Park, near the waterfront in Vancouver. The Crab sculpture by George Norris is outside, near the entrance.

Outside the building stands The Crab, a sculpture by George Norris that won a 1967 design competition. It is not a museum sign but a piece of public art tied to the site's Centennial-era origins, and it predates the Space Centre's 1990s rebranding.