Steward Observatory

Steward Observatory is the research arm of the Department of Astronomy at the University of Arizona (UArizona). Its offices are located on the UArizona campus in Tucson, Arizona (US). Established in 1916, the first telescope and building were formally dedicated on April 23, 1923. It now operates, or is a partner in telescopes at five mountain-top locations in Arizona, one in New Mexico, one in Hawaii, and one in Chile. It has provided instruments for three different space telescopes and numerous terrestrial ones. Steward also has one of the few facilities in the world that can cast and figure the very large primary mirrors used in telescopes built in the early 21st century.

Mont Mégantic Observatory

The Mont Mégantic Observatory is an astronomical observatory owned and operated jointly by the Université de Montréal (UdeM), and the Université Laval (ULaval). Founded in 1978, the observatory houses the second largest telescope in Eastern Canada

Félix Aguilar Observatory

Félix Aguilar Observatory is an astronomical observatory. It was established in 1953, in San Juan Province, Argentina. In 1974, it was renamed to Carlos Ulrrico Cesco Astronomical Station

Comet Pons

Comet Pons may refer to any one of these comets:C/1801 N1 C/1802 Q1 C/1804 E1 C/1806 V1 C/1808 F1 C/1808 M1 C/1810 Q1 C/1811 W1 C/1813 C1 C/1813 G1 C/1816 B1 C/1817 Y1 C/1818 W2 C/1822 K1 C/1822 N1 C/1825 N1 C/1825 P1 C/1825 V1 C/1826 P1 C

Portage Lake Observatory

The Portage Lake Observatory (PLO) was an astronomical observatory owned and operated by the University of Michigan (UM). It was located near the village of Dexter, Michigan (USA), about 20 kilometers (12 mi) northwest of Ann Arbor. Construction at the

Peach Mountain Observatory

The Peach Mountain Observatory (PMO) is an astronomical observatory owned and operated by the University of Michigan (UM). It is located near the village of Dexter, Michigan (USA), about 20 kilometers (12 mi) northwest of Ann Arbor. It was opened in 1955

Itapetinga Radio Observatory

Pierre Kauffman Radio Observatory, also known as the Itapeting Radio Observatory, is a radio observatory located in the municipality of Atibaia in the state of São Paulo in Brazil. It is located approximately 7.5 km (4.7 mi) south of Atibaia and 40 km

Five College Radio Astronomy Observatory

The Five College Radio Astronomical Observatory (FCRAO) was a radio astronomy observatory located on a peninsula in the Quabbin Reservoir. It was sited in the town of New Salem, Massachusetts on land that was originally part of Prescott, Massachusetts. It

O'Brien Observatory

The O'Brien Observatory (OBO) is an astronomical observatory in the city of Marine on St. Croix, Minnesota, United States, about 35 kilometers (22 mi) northeast of Minneapolis. The observatory is owned and operated by the University of Minnesota and

Tortugas Mountain Observatory

Tortugas Mountain Observatory (TMO) is an astronomical observatory owned and operated by New Mexico State University (NMSU). It is located on Tortugas Mountain, also known locally as 'A' Mountain, in southern New Mexico (USA), approximately 8 kilometers

Alkylammonium

In organic chemistry, alkylammonium refers to cations of the formula [R4−nNHn]+, where R = alkyl and 1≤ n ≤ 4. The cations with four alkyl substituents, i.e., [R4N]+, are further classified as quaternary ammonium cations and are discussed more