Lowell Observatory, Anderson Mesa Station (IAU code 688) was established in 1959 as a dark-sky observing site for Lowell Observatory. Anderson Mesa is now home to several large reflecting telescopes that are used for observing programs such as LONEOS. The site is located about 12 miles southeast of Lowell's main campus on Mars Hill in Flagstaff, Arizona. Lowell Observatory Percival observing Mars from the Clark telescope at the Lowell Observatory. ... Aerial view of USNO. The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States. ... Nickname: City of Seven Wonders Location in Coconino County the state of Arizona Coordinates: Country United States State Arizona County Coconino County Mayor Joseph C. Donaldson Area    - City 63. ... Cassegrain may refer to the Cassegrain Reflector Laurent Cassegrain, catholic priest and teacher and probably the inventor of the Cassegrain Reflector Sieur Guillaume Cassegrain, French sculptur Categories: Disambiguation ... 50 cm refracting telescope at Nice Observatory. ... The Ritchey-Chrétien is a specialized Cassegrain reflector which has two hyperbolic mirrors (instead of a parabolic primary). ... 50 cm refracting telescope at Nice Observatory. ... Ritchey 24 reflecting telescope A reflecting telescope (reflector) is an optical telescope which uses a combination of curved and plane (flat) mirrors to reflect light and form an image (catoptric), rather than lenses to refract or bend light to form an image (dioptric). ... Lowell Observatory Near-Earth-Object Search (LONEOS) is a program run by NASA and Lowell Observatory to discover near-Earth objects. ... Optical systems which involve both lenses and mirrors. ... The Navy Prototype Optical Interferometer (NPOI) is an interferometer operated by the US Naval Observatory, the Naval Research Laboratory and The Lowell Observatory. ... Interferometry is the applied science of combining two or more input points of a particular data type, such as optical measurements, to form a greater picture based on the combination of the two sources. ... Logo of the IAU The International Astronomical Union (French: Union astronomique internationale) unites national astronomical societies from around the world. ... Lowell Observatory Percival observing Mars from the Clark telescope at the Lowell Observatory. ... Lowell Observatory Near-Earth-Object Search (LONEOS) is a program run by NASA and Lowell Observatory to discover near-Earth objects. ... Nickname: City of Seven Wonders Location in Coconino County the state of Arizona Coordinates: Country United States State Arizona County Coconino County Mayor Joseph C. Donaldson Area    - City 63. ...

Telescopes

• The 72-inch (1.8 m) Perkins Telescope, shared with Boston University and moved to Anderson Mesa in 1961 from Perkins Observatory in Delaware, Ohio (originally a 69-inch mirror, then the largest single piece of glass ever cast, a distinction that may still hold to this day)
• The 42-inch (1.1 m) John Hall Telescope
• A 31-inch (79 cm) telescope, originally used by the U.S. Geological Survey (USGS) in a Moon-mapping project, later refurbished for use by undergraduates and the public
• The 24-inch (60 cm) Lowell Observatory Near-Earth-Object Search (LONEOS) Schmidt telescope, used in the search for asteroids and other near-earth objects
• The Navy Prototype Optical Interferometer (NPOI), a joint venture of the Lowell Observatory, the U.S. Naval Observatory (USNO), and the U.S. Naval Research Laboratory (NRL)

For the unrelated Jesuit university in Chestnut Hill, see Boston College. ... 1961 (MCMLXI) was a common year starting on Sunday (the link is to a full 1961 calendar). ... The Perkins Observatory is an astronomical observatory in Delaware, Ohio. ... The City of Delaware is located near the center of the state of Ohio, about 20 miles north of Columbus, Ohio. ... The United States Geological Survey (USGS) is a scientific agency of the United States government. ... Lowell Observatory Near-Earth-Object Search (LONEOS) is a program run by NASA and Lowell Observatory in Flagstaff, Arizona, to discover near-Earth objects. ... A Schmidt camera is an astronomical camera designed to provide wide fields of view with limited aberrations. ... 253 Mathilde, a C-type asteroid. ... Near-Earth objects (NEO) are asteroids, comets and large meteoroids whose orbit intersects Earths orbit and which may therefore pose a collision danger. ... The Navy Prototype Optical Interferometer (NPOI) is an interferometer operated by the US Naval Observatory, the Naval Research Laboratory and The Lowell Observatory. ... Lowell Observatory Percival observing Mars from the Clark telescope at the Lowell Observatory. ... Aerial view of USNO. The United States Naval Observatory (USNO) is one of the oldest scientific agencies in the United States. ... The US Naval Research Laboratory (NRL) is the corporate research laboratory for the United States Navy and the United States Marine Corps and conducts a broad program of scientific research and advanced development. ...

NPOI

The NPOI is the largest operating optical telescope in the world. It is a Y configuration of three 50 cm optical siderostats. The inner fixed stations are used for astrometry while stations on the outer arms, out to an eventual separation of more than 300 m, are used for imaging stars. The stations are connected by vacuum beam lines. Fast delay lines in the main control building and long delay lines outside are used to adjust the optical phases to allow coherent combinations of up to six siderostats. Used for astrometry and astronomical imaging, the NPOI is a distributed aperture optical telescope. It is operated for astrometry by the USNO. Research into optical imaging and astronomical research is conducted by the NRL. 50 cm refracting telescope at Nice Observatory. ... This article needs cleanup. ... This article does not cite its references or sources. ... The Pleiades, an open cluster of stars in the constellation of Taurus. ... Look up Vacuum in Wiktionary, the free dictionary. ...

Funding for the NPOI was initiated by the Oceanographer of the Navy and the Office of Naval Research (ONR) in 1989. Design work began on all phases of the project. After approximately a year and a half, the initial phase of construction was completed in early 1994. This included the concrete piers to hold the siderostats, beam compressors, elevator cans and center feed cans for the imaging and astrometric arrays, the control and lab buildings and the astrometric huts. The East arm feed pipe installation was completed by December 1998. ONR Logo The Office of Naval Research (ONR), headquartered in Arlington, Virginia (Ballston), is an office of the U.S. Navy that carries out scientific research to support the Navy and Marine Corps in the interest of national security. ... 1989 (MCMLXXXIX) was a common year starting on Sunday of the Gregorian calendar. ... 1994 (MCMXCIV) was a common year starting on Saturday of the Gregorian calendar, and was designated as the International Year of the Family and the International Year of the Sport and the Olympic Ideal by United Nations. ... 1998 (MCMXCVIII) was a common year starting on Thursday of the Gregorian calendar, and was designated the International Year of the Ocean. ...

Sources

• Anderson Mesa at Lowell Workshop
• The Telescopes of Lowell Observatory