The planetarium allows you to gaze at the stars of the sky thanks to the projections onto the dome screen and the seasonal positions of the stars. The building which was designed by architect, Portaluppi was sited within the Public Gardens of Palestro at the request of the Editor Hoepli who then donated it to the city in 1930. Projection shows and conferences are organised throughout the year. Ring in the morning to book your visit as opening times vary depending on what events are on. There are special opening times for schools.