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  2. Televue - Wikipedia

    en.wikipedia.org/wiki/Televue

    Tele Vue once manufactured a 5" refracting telescope named the MPT, the Multi-Purpose Telescope. It had a fast f/4 ratio, and had an adjustable diaphragm that ranged from f/4 to f/20. Only a small number were made, with the last being kept by Televue to use as a final optical quality control for all eyepieces they make.

  3. Griffith Observatory - Wikipedia

    en.wikipedia.org/wiki/Griffith_Observatory

    As long as the weather permits, the Observatory offers free public telescope viewing every night the observatory is open - usually beginning at 7:00 p.m. This includes the historic 12" Zeiss Refracting Telescope on the roof, and up to four portable telescopes placed outside offering views of visible celestial objects for the night.

  4. James Webb Space Telescope - Wikipedia

    en.wikipedia.org/wiki/James_Webb_Space_Telescope

    To make observations in the infrared spectrum, Webb must be kept under 50 K (−223.2 °C; −369.7 °F); otherwise, infrared radiation from the telescope itself would overwhelm its instruments. Its large sunshield blocks light and heat from the Sun, Earth, and Moon, and its position near the Sun–Earth L 2 keeps all three bodies on the same ...

  5. Hubble Space Telescope - Wikipedia

    en.wikipedia.org/wiki/Hubble_Space_Telescope

    The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy.

  6. Giant Magellan Telescope - Wikipedia

    en.wikipedia.org/wiki/Giant_Magellan_Telescope

    The Giant Magellan Telescope (GMT) is a ground-based, extremely large telescope currently under construction at Las Campanas Observatory in Chile's Atacama Desert.With a primary mirror diameter of 25.4 meters, it is expected to be the largest Gregorian telescope ever built, observing in optical and mid-infrared wavelengths (320–25,000 nm). [1]

  7. Storm King School - Wikipedia

    en.wikipedia.org/wiki/Storm_King_School

    In 1990, during the tenure of headmaster John H. Suitor, a roll-off shed observatory was built on campus to house a late-19th century refractor telescope, a gift from board member Robert Cobb, that was originally owned by Erard Mathiessan. It was eventually sold to finance the purchase of the school's current Parks Newtonian telescope.

  8. Rings of Saturn - Wikipedia

    en.wikipedia.org/wiki/Rings_of_Saturn

    It was discovered in 1675 by Giovanni Cassini at the Paris Observatory using a refracting telescope that had a 2.5-inch objective lens with a 20-foot-long focal length and a 90x magnification. [ 106 ] [ 107 ] From Earth it appears as a thin black gap in the rings.

  9. Monterey Park, California - Wikipedia

    en.wikipedia.org/wiki/Monterey_Park,_California

    Monterey Park is home to the Garvey Ranch Observatory, located in Garvey Ranch Park, which is operated by the Los Angeles Astronomical Society (LAAS). It adjoins a historical museum, a classroom, and a workshop. The observatory houses an 8-inch (200 mm) refractor, a telescope making workshop, and a library containing over 1000 books. The ...

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