Telescope
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A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. Originally, it was an optical instrument using lenses, curved mirrors
The 100-inch (2.5 m) Hooker reflecting telescope at Mount Wilson Observatory near Los Angeles, used by Edwin Hubble to measure galaxy redshifts and discover the general expansion of the universe.
Replica of possibly the oldest surviving telescope (1609–1640), suspected to be an early "Cannocchiali" refracting telescope by Galileo Galilei.
A replica of a second reflecting telescope Isaac Newton presented to the Royal Society in London in 1672
Three radio telescopes belonging to the Atacama Large Millimeter Array
Radio telescope
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A radio telescope is a specialized antenna and radio receiver used to detect radio waves from astronomical radio sources in the sky. Radio telescopes are the main observing instrument used in radio as
The 64-meter radio telescope at Parkes Observatory as seen in 1969, when it was used to receive live televised video from Apollo 11
Antenna of UTR-2 low frequency radio telescope, Kharkiv region, Ukraine. Consists of an array of 2040 cage dipole elements.
Full-size replica of the first radio telescope, Jansky's dipole array of 1932, preserved at the US Green Bank Observatory in Green Bank, West Virginia.
Ooty radio telescope, a 326.5 MHz dipole array in Ooty, India