Gravitational lensing is useful to cosmologists because it is directly sensitive to the amount and distribution of dark matter. This is because the amount of light bending is sensitive only to the strength of the gravitational field it passes through*, which is mostly generated by the mass of the dark matter in the Universe.
Union City is a city in Wayne Township, Randolph County, Indiana, United States. As of the 2010 census, the city had a population of 3,584. Union City was a stop along the Pittsburgh, Cincinnati, Chicago and St. Louis Railroad, a forerunner of the Pennsylvania Railroad that connected Pittsburgh to Chicago and St. Louis.
Union Springs is a village in Cayuga County, New York, United States. The population was at 1,074 people at the 2000 census. The name is derived from the mineral springs near the village. The Village of Union Springs is in western part of the Town of Springport and is southwest of Auburn, New York. The village is south of the former Cayuga tribe village of Gwau-gwah (Cayuga Castle), which became a Jesuit Mission. The native village was a target of the Sullivan Expedition of 1779.