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 City in the third position in the list of smallest cities in the United States. In the fourth place of the smallest cities in the U.S., you might want to see the appearance of Union City is located in New Jersey. Land cover on 1.30 square miles. There are 66,455 who live in this city on the census of 2010.