Providence, Rhode Island

Providence is the capital and most populous city in Rhode Island. Founded in 1636, it is one of the oldest cities in the United States. It is located in Providence County, and is the third-largest city in the New England region after Boston and Worcester. Providence has a city population of 179,154 and is part of the 38th-largest metropolitan population in the country, with an estimated population of 1,604,291, exceeding that of Rhode Island by about 60%, as it extends into southern Massachusetts. This can be considered in turn to be part of the Greater Boston commuting area, which contains 7.6 million people. The city is situated at the mouth of the Providence River, at the head of Narragansett Bay.

Providence was founded by Roger Williams, a religious exile from the Massachusetts Bay Colony. He named the area in honor of "God's merciful Providence", which he believed was responsible for revealing such a haven for him and his followers to settle. After becoming one of the first cities in the country to industrialize, Providence became noted for its jewelry and silverware industry. Today, the city of Providence is home to eight hospitals and seven institutions of higher learning, which has shifted the city's economy into service industries, though it still retains significant manufacturing activity.

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Zodiac

In both astrology and historical astronomy, the zodiac (Greek: ζῳδιακός, zōidiakos) is a circle of twelve 30° divisions of celestial longitude that are centered upon the ecliptic, the apparent path of the Sun across the celestial sphere over the course of the year. The paths of the Moon and visible planets also remain close to the ecliptic, within the belt of the zodiac, which extends 8-9° north or south of the ecliptic, as measured in celestial latitude. Because the divisions are regular, they do not correspond exactly to the boundaries of the twelve constellations after which they are named.

Historically, these twelve divisions are called signs. Essentially, the zodiac is a celestial coordinate system, or more specifically an ecliptic coordinate system, which takes the ecliptic as the origin of latitude, and the position of the Sun at vernal equinox as the origin of longitude.

Usage

The zodiac was in use by the Roman era, based on concepts inherited by Hellenistic astronomy from Babylonian astronomy of the Chaldean period (mid-1st millennium BC), which, in turn, derived from an earlier system of lists of stars along the ecliptic. The construction of the zodiac is described in Ptolemy's vast 2nd century AD work, the Almagest.

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See also