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  2. List of astronomical catalogues - Wikipedia

    en.wikipedia.org/wiki/List_of_astronomical...

    An astronomical catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. Astronomical catalogs are usually the result of an astronomical survey of some kind.

  3. Area codes in Mexico by code - Wikipedia

    en.wikipedia.org/wiki/Area_codes_in_Mexico_by_code

    Country code: 52; International call prefix: 00; Trunk Prefix: none; The telecommunication services of Mexico are provided by a division of the telephone numbering plan into groups of area codes for the following regions: [1]

  4. List of astronomical observatories - Wikipedia

    en.wikipedia.org/wiki/List_of_astronomical...

    Tonantzintla, Mexico Observatorio Solar Carl Sagan: 2000 Hermosillo, Sonora, Mexico Observatory House (defunct) 1789 Slough, UK Observatory of the rue Serpente (defunct) 1890–1968 Paris, France Oil Region Astronomical Observatory: Venango County, Pennsylvania, US Onan Observatory: 1990 Norwood Young America, Minnesota, US

  5. List of nearby stellar associations and moving groups

    en.wikipedia.org/wiki/List_of_nearby_stellar...

    The regions with higher density of stars are shown; these correspond with known star clusters (Hyades and Coma Berenices) and moving groups. This is a list of nearby stellar associations and moving groups. A stellar association is a very loose star cluster, looser than an open cluster. A moving group is the remnant of such a stellar association ...

  6. List of archaeoastronomical sites by country - Wikipedia

    en.wikipedia.org/wiki/List_of_archaeo...

    This is a list of sites where claims for the use of archaeoastronomy have been made, sorted by country.. The International Council on Monuments and Sites (ICOMOS) and the International Astronomical Union (IAU) jointly published a thematic study on heritage sites of astronomy and archaeoastronomy to be used as a guide to UNESCO in its evaluation of the cultural importance of archaeoastronomical ...

  7. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    prior to 1991, was the area code for Mexico City; split of 416; 2001: overlaid by 289; 2013: overlaid by 365; 2021: overlaid by 742 [8] 537 reserved as a fifth area code for the region. 906: Michigan (Upper Peninsula: Sault Ste. Marie, Escanaba, Houghton, Iron Mountain, Marquette, Menominee, etc.) March 19, 1961: split of 616; 907

  8. List of most massive star clusters - Wikipedia

    en.wikipedia.org/wiki/List_of_most_massive_star...

    The masses of open star clusters can be estimated by measuring the falloff of radial and tangential velocities of surrounding stars at a particular distance. [ 4 ] List

  9. Tonantzintla Observatory - Wikipedia

    en.wikipedia.org/wiki/Tonantzintla_Observatory

    OANTON was dedicated in February 1942 in a ceremony attended by the President of Mexico, Manuel Ávila Camacho, and other dignitaries. [2] The project was begun some time earlier by Luis Enrique Erro , who was an astronomer by training but for many years had been the Mexican ambassador to the United States.