For general questions on astronomy the visitor may ask the planetarium during the usual working hours, for the chances are best to speak to a competent astronomer. Their business embrace the development of new shows, organisation of future events or bringing astronomy to the classes. A superb occasion to find out about the latest incidents at first hand will be public lectures. An extra subject on astronomy is in the spotlight and acts to deepen the general knowledge. Questions are very appreciated, for the planetarium is supposed to be the bridge connecting the professional researchers and the public. In many cases the expert lectures will take place on a weekday in the evening time.