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CROSS SECTION OF AN ASTRONOMICAL OBSERVATORY
cross section of an astronomical observatory
prime focus observing capsule
Area where astronomers once gathered to monitor the exposure time of photographic plates.
Emitted by the celestial body, light is sent back toward the Cassegrain focus by the primary and secondary mirrors.
Focal point of the primary mirror where the light rays concentrate.
Area where most observations are carried out.
Focal point where the image forms; located behind the primary mirror.
Optical instrument that uses an objective mirror to observe celestial bodies.
Mirror that reflects the light of celestial bodies, directing it toward the prime focus.
hour angle gear
Drive mechanism allowing the telescope to follow the polar axis.
Adjustable mirror making it possible to choose the location of the focus.
Pedestal on which the telescope mount rests.
Mount used to support a large telescope and point it toward the celestial pole.
Axis parallel to Earth’s axis of rotation; its rotation is opposite to that of Earth, making it possible to capture fixed images of an observed celestial body.
Mirror that intercepts light and redirects it toward the Cassegrain focus through a hole in the center of the primary mirror.
Area where the chemical composition of observed celestial bodies is studied using spectroscopy.
Focal point located at a distance from the telescope, obtained using a series of mirrors; stationary, it is used to conduct complex analyses and experiments.
interior dome shell
Regulates the temperature of the telescope so as to avoid air turbulence and prevent the mirror from becoming deformed.
exterior dome shell
Protects against foul weather.
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