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Multiple mirror telescopes that are on the same mount and can form a single combined image are ranked by their equivalent aperture. Fixed altitude telescopes (e.g. HET) are also ranked by their equivalent aperture. All telescopes with an effective aperture of at least 3.00 metres (118 in) at visible or near-infrared wavelengths are included.
This is a list of large optical telescopes. For telescopes larger than 3 meters in aperture see List of largest optical reflecting telescopes . This list combines large or expensive reflecting telescopes from any era, as what constitutes famous reflector has changed over time.
Foucault's telescope 0.8 m 31.5" glass mirror reflector: First metal coated glass mirror telescope Marseille Observatory, France 1862 William Lassell 48-inch [14] 1.22 m: 48" speculum metal mirror reflector: Malta: 1861–1865 Rosse telescope: Leviathan of Parsonstown: 1.83 m: 72" metal – speculum metal mirror reflector: World's largest 1845 ...
The Swedish 1-m Solar Telescope, with a lens diameter of 43 inches, is technically the largest, with 39 inches clear for the aperture.The second largest refracting telescope in the world is the Yerkes Observatory 40 inch (102 cm) refractor, used for astronomical and scientific observation for over a century.
The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy.As the largest telescope in space, it is equipped with high-resolution and high-sensitivity instruments, allowing it to view objects too old, distant, or faint for the Hubble Space Telescope. [9]
Powerful Webb Telescope Captures Most Distant Known Galaxy, Scientists Say. This background image of the region around supernova remnant Cassiopeia A was released by NASA’s Spitzer Space ...
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