Museum of Astronomy and Related Sciences, Scientific museum in São Cristóvão, Rio de Janeiro, Brazil.

The Museum of Astronomy and Related Sciences occupies a campus of about 44,000 m² on Morro de São Januário in São Cristóvão, Rio de Janeiro, with 16 buildings from the 1920s. Its astronomical observation pavilions have prefabricated iron domes bought from Germany, England and France, and still hold their original scientific instruments.

The MAST was created on 8 March 1985 as a research unit of the Ministry of Science, Technology, Innovations and Communications. It occupies a campus of about 44,000 m² on the Morro de São Januário in São Cristóvão, with 16 buildings from the 1920s, including the astronomical observation pavilions. The architectural and landscape ensemble was listed by IPHAN in 1986 and by INEPAC in 1987.

The museum occupies the São Januário hill campus in São Cristóvão, where its 1920s pavilions keep the prefabricated iron domes bought from Germany, England and France for astronomical observation. The name MAST signals its link to the National Observatory, whose instruments it holds. Visitors join guided tours, workshops and the traditional sun and sky observations.

The museum is at Rua General Bruce 586, on Morro de São Januário in São Cristóvão, not in Quinta da Boa Vista. Its campus covers about 44,000 m² with 16 buildings from the 1920s, so allow time to walk between the pavilions. Guided visits and solar and sky observations are offered; check beforehand when they take place.

The museum occupies the Morro de São Januário campus in São Cristóvão, a site of about 44,000 m² with 16 buildings from the 1920s. Its astronomical observation pavilions keep iron domes prefabricated in Germany, England and France, listed by IPHAN in 1986 and INEPAC in 1987.