Galileo Galilei planetarium
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 Location within Buenos Aires
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| Established | December 20, 1966 |
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| Location | Palermo Woods, Palermo, Buenos Aires, Argentina |
| Coordinates | 34°34′11″S 58°24′42″W / 34.56972°S 58.41167°W |
| Type | Planetarium |
| Architect | Enrique Jan |
| Website | Official Website |
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. Construction began under the direction of architect Enrique Jan in 1962, and it was inaugurated on December 20, 1966. 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. The facility was officially opened to the public on April 5, 1968.
The building has five floors, six staircases and a 20 metres (66 ft) diameter room with 360 seats. The inside of the 20m semispherical dome is covered with reflective aluminium.
The planetarium (Zeiss projector Model M V) itself is located in the centre, it has over 100 projectors and is approximately 5 metres (16 ft) in height and 2.5 tons in weight. 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.
View of the Planetarium during the Buenos Aires Pillow Fight
The Planetarium at dusk
The Planetarium and the artificial lake in the foreground
The Planetarium in a cloudy day
Infrared image of The Planetarium
The building during the day
Coordinates: 34°34′11″S 58°24′42″W / 34.56972°S 58.41167°W
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