Hayden Planetarium is a must-see place for astronomers. When we arrived, we watched a three-dimensional movie about the origin of the Big Bang Theater in Hayden. It was not long, but it was quite knowledgeable. After reading, you can walk along the arc aisle and see how the universe developed after its origin. This is an affiliated Museum of the American Museum of Natural History, so you can visit it as long as you have tickets for the American Museum of Natural History.