The Galileo Galilei planetarium, commonly known as Planetario, is located in Parque Tres de Febrero in the Palermo district of Buenos Aires, Argentina.

The idea that Buenos Aires should have a planetarium began to take shape in 1958 by an agreement between Socialist Councilman José Luis Peña and the municipal Secretary of Culture, Dr. Aldo Cocca.

The first function was carried out on June 13, 1967 for the students of "Escuela Comercial Nº 1" of Banfield and "Santa Unión de los Sagrados Corazones" of Capital Federal.

Professor of geography and mathematics Antonio Cornejo showed them the sky over Buenos Aires, Argentine Antarctica and the South Pole, as well as demonstrating the orientation of the southern cross.

It consists of a cylindrical framework with independent projectors for the Moon, the Sun and the visible planets (Mercury, Venus, Mars, Jupiter and Saturn) and two spheres in the extremes that project 8,900 stars, constellations and nebulas.