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Primary mirror

A primary mirror is the principal light-gathering surface of a reflecting telescope. The primary mirror of a reflecting telescope is a spherical or parabolic shaped disks of polished reflective metal, or in telescopes, glass or other material coated with a reflective layer. One of the first known reflecting telescopes, Newton's reflector of 1668, used a 3.3 cm polished metal primary mirror. The next major change was to use silver on glass rather than metal, in the 19th century such was with the Crossley reflector; this was changed to vacuum deposited aluminum on glass, used on the 200-inch Hale telescope. Solid primary mirrors have to sustain their own weight and not deform under gravity, which limits the maximum size for a single piece primary mirror. Segmented mirror configurations are used to get around the size limitation on single primary mirrors. For example, the Giant Magellan Telescope will have seven 8.4 meter primary mirrors, with the resolving power equivalent to a 24.5 m optical aperture.

The largest optical telescope in the world as of 2009 to use a non-segmented single-mirror as its primary mirror is the 8.2 m Subaru telescope of the National Astronomical Observatory of Japan, located in Mauna Kea Observatory on Hawaii since 1997. S./German/Italian Large Binocular Telescope has two 8.4 m mirrors. Both of these are smaller; the Hubble Space Telescope has a 2.4 m primary mirror. Radio and submillimeter telescopes use much larger dishes or antennae, which do not have to be made as as the mirrors used in optical telescopes; the Arecibo Observatory uses a 305 m dish, the world largest single-dish radio telescope fixed to the ground. The Green Bank Telescope has the world's largest steerable single radio dish with 100 m in diameter. There are larger radio arrays, composed of multiple dishes which have better image resolution but less sensitivity. Active optics Honeycomb mirror Liquid-mirror telescope List of largest optical reflecting telescopes List of telescope parts and construction Mirror mount Mirror support cell Secondary mirror

Student Comrade Prisoner Spy

Student Comrade Prisoner Spy is a 2016 autobiography by South African journalist Bridget Hilton-Barber. The book recounts Hilton-Barber's opposition to apartheid as a young white student at Rhodes University in the Eastern Cape, the betrayal by her best friend Olivia Forsyth, a spy working for the Security Branch of the South African Police; the betrayal led to her imprisonment without trial. Thirty years Hilton-Barber suffers a flashback which prompts her to journey back to the Eastern Cape to see if she can forgive her betrayer and move on from the brutal violence she suffered during the dying days of apartheid. In the City Press Sandra Laurence described the book as "chilling, terrifying and sad all at once" and a "catalogue of good intentions and grave risks taken", which made for "...captivating and enjoyable reading". Laurence praised the "clarity" and "honesty" of the memoir; the book was reviewed in the Springs Advertiser

Hello Kitty: Roller Rescue

Hello Kitty: Roller Rescue is a 2005 action-adventure-racing video game developed by XPEC Entertainment for the PlayStation 2, GameCube and Windows. The game features other Sanrio characters; the game features additional character designs by Hunter Roberson and Rhett Deal. A Hello Kitty Crystal Xbox was released with Sanrio in Singapore, to commemorate the release of the game on the Xbox; the special edition console was translucent with a pink and orange Hello Kitty picture covering the X on top of the case. A limited production run of 550 units was sold at a retail price of S$99, if you purchased certain selected Samsung LCD TVs during a promotion. Included with the Hello Kitty Crystal console was a matching Crystal Controller S and a copy of Hello Kitty Mission Rescue; the game received mixed reviews from critics. It holds a 64% rating on Metacritic. IGN rated the game 6 of 10 calling it just "Okay". XPEC game page Hamster page Hello Kitty: Roller Rescue at MobyGames

Meanings of minor planet names: 43001–44000

As minor planet discoveries are confirmed, they are given a permanent number by the IAU's Minor Planet Center, the discoverers can submit names for them, following the IAU's naming conventions. The list below concerns those minor planets in the specified number-range that have received names, explains the meanings of those names. Official naming citations of newly named small Solar System bodies are published in MPC's Minor Planet Circulars several times a year. Recent citations can be found on the JPL Small-Body Database; until his death in 2016, German astronomer Lutz D. Schmadel compiled these citations into the Dictionary of Minor Planet Names and updated the collection. Based on Paul Herget's The Names of the Minor Planets, Schmadel researched the unclear origin of numerous asteroids, most of, named prior to World War II; this article incorporates public domain material from the United States Government document: "SBDB". New namings may only be added after official publication as the preannouncement of names is condemned by the Committee on Small Body Nomenclature.

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Madeleine Wing Adler

Madeleine Wing Adler was the first female president of West Chester University in West Chester, Pennsylvania. She received a bachelor's degree from Northwestern University and master's degree and Ph. D. from the University of Wisconsin–Madison. Prior to her West Chester University presidency, she held administrative positions at Framingham State College in Massachusetts, The City University of New York, Queens College, the CUNY Central Office. Adler has taught at American University and Pennsylvania State University. Adler has served on numerous boards and committees for civic organizations, including Chester County Fund for Women and Girls, the Chester County Historical Society and the National Endowment for the Arts/American Canvas. In 1998, Chester County named her its citizen of the year and the Philadelphia Business Journal named her a Woman of Distinction in 2002. On May 3, 2007, Adler announced her retirement after serving 15 years at the institution, she is a senior associate at The AASCU-Penson Center for Professional Development, plans will retire to her family's ancestral seaport town of Sandwich, Massachusetts, on Cape Cod.

The Madeleine Wing Adler Theatre which opened in 2008, is the newest performing arts venue on the West Chester University campus and has a capacity of 375. It was named in honor of Madeleine Wing Adler in 2008. Adler is a breast cancer survivor, has received the Pennsylvania Breast Cancer Coalition’s Pink Ribbon Award in 2001

Nobuhiro Ōkōchi

Nobuhiro Ōkōchi was a Japanese painter. In 1918, Ōkōchi studied watercolor under Sanchi Itakura and printmaking under Kishio Koizumi as well as other methods under Okada Saburōsuke, he contributed to the magazine You and I in 1922. He graduated from the Meiji University Department of Economics in 1928 and studied at Hongō Painting Institute under Manjirō Terauchi in 1930. Ōkōchi participated in the 1931 Nihon Hanga Kyōkai exhibition. In 1933, Ōkōchi's painting, A corner of the room, won the fourteenth Emperor Exhibition prize from the Imperial Art Academy. By 1937, he was researching art from Europe. Ōkōchi became a member of Kōfūkai in 1940. He and Kanemon Asai as well as others formed Shinjukai in 1947. Ōkōchi was the second son of Viscount Masatoshi Ōkōchi, the director of Riken, the daughter of Ōkōchi Nobuhisa. Chieko was his wife, his daughter with her was actress Momoko Kōchi. Nobuhiro Okochi on IMDb