The Saint Louis Science Center, founded as a planetarium in 1963, is a collection of buildings including a science museum and planetarium in St. Louis, Missouri, on the southeastern corner of Forest Park. With over 750 exhibits in a complex of over , it is among the largest of its type in the country, and according to the Association of Science and Technology Centers, is one of the top 5 science centers in the United States. In 1991, it was the most visited science center in the world. As of 2007, the complex hosts 1.2 million visitors each year, with another 200,000 served through offsite programs at schools and community centers.