The planetarium building is very innovative, with a huge IMAX theater doubling as a model of the sun. The planets of our solar system, built to scale, are clustered around the sun model. Unfortunately, the exhibits were out of order, so it was not much of a learning experience. Admission to the planetarium includes access to the rest of the American Museum of Natural History. At more than $25 for an adult admission, I did not think that the star show was informative enough to warrant that fee. It also disturbs me that patrons are herded into the gift shop after the planetarium show is over.