 The Planetarium of Nantes can not be visited as a museum, it offers commented sessions of about an hour (as in the cinema but live).Each session, scheduled according to a schedule established in advance, is adapted to a certain type of public, according to the age or the level of knowledge.Under a dome 8 meters (26 ft) in diameter, it can accommodate 51 spectators and accommodate about 50,000 visitors per year, school or the general public.