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  2. Del E. Webb Construction Company - Wikipedia

    en.wikipedia.org/wiki/Del_E._Webb_Construction...

    Sun City was a success, with the company selling 237 homes within its first three days of opening. [12] It was followed by Sun City, California, the Kern City, Sun City Center, Florida, and similar developments in Nevada, Illinois, and Massachusetts. [13]

  3. Mean longitude - Wikipedia

    en.wikipedia.org/wiki/Mean_longitude

    Then mean longitude is also [1] L = ϖ + M. Another form often seen is the mean longitude at epoch, ε. This is simply the mean longitude at a reference time t 0, known as the epoch. Mean longitude can then be expressed, [2] L = ε + n(t − t 0), or L = ε + nt, since t = 0 at the epoch t 0. where n is the mean angular motion and t is any ...

  4. Sun City, Arizona - Wikipedia

    en.wikipedia.org/wiki/Sun_City,_Arizona

    Sun City is an unincorporated community and census-designated place in Maricopa County, Arizona, United States, that is located within the Phoenix metropolitan area. The population was 39,931 as of the 2020 census. [3] Its adjoining sister city is Sun City West. Both Sun Cities are retirement communities popular with snowbirds.

  5. Geodetic coordinates - Wikipedia

    en.wikipedia.org/wiki/Geodetic_coordinates

    Geodetic latitude and geocentric latitude have different definitions. Geodetic latitude is defined as the angle between the equatorial plane and the surface normal at a point on the ellipsoid, whereas geocentric latitude is defined as the angle between the equatorial plane and a radial line connecting the centre of the ellipsoid to a point on the surface (see figure).

  6. Decimal degrees - Wikipedia

    en.wikipedia.org/wiki/Decimal_degrees

    The equator is divided into 360 degrees of longitude, so each degree at the equator represents 111,319.5 metres (365,221 ft). As one moves away from the equator towards a pole, however, one degree of longitude is multiplied by the cosine of the latitude, decreasing the distance, approaching zero at the pole.

  7. East Argent and Sun City, SC, residents will have to wait a ...

    www.aol.com/east-argent-sun-city-sc-175813818.html

    The development has plans to add nearly 10,000 homes and apartments, 1.5 million square feet of retail and office space and 1,330 acres of passive and recreational park space.

  8. Sun City Texas - Wikipedia

    en.wikipedia.org/wiki/Sun_City_Texas

    Sun City Texas is a 4,750-acre (19.2 km 2) [1] age-restricted community located in Georgetown, Texas, a city 35 miles north of Austin off Interstate 35. It is part of the chain of Sun City communities started by Del Webb .

  9. Earth-centered, Earth-fixed coordinate system - Wikipedia

    en.wikipedia.org/wiki/Earth-centered,_Earth...

    The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass.