Aurora, illinois is 5,924 times larger than Centennial, Colorado.
Area: 0 km2 calculated
The City of Centennial is a Home Rule City located in Arapahoe County, Colorado, United States, and part of the Denver-Aurora metropolitan area. The city had a total population of 100,377 in 2010 census. Wikipedia
Area: 412 km2 calculated
Aurora is a city in DuPage, Kane, Kendall, and Will counties in the U.S. state of Illinois. The second most populous city in the state, it is the 19th largest city in the Midwest and the 112th largest city in the country. Wikipedia