Right next to Mahalaxmi Race Course, the Nehru Planetarium is a large domed building, popular with the city's amateur astronomers. Inside, various cubicles estimate your weight on each of the nine planets of the Solar System while in the domed interior, daily shows uncover the timeless mysteries of the cosmos. The place is usually packed with school children so make sure you buy your ticket in advance. Adjacent to the planetarium is the Nehru Centre, venue of numerous international trade fairs and local exhibitions. In the basement, the Nehru Auditorium usually boasts classical music and dance recitals, concerts and plays.