Opening hours The Science Centre and planetarium in Tromsø is open almost every day, all year. Our opening hours are 11 - 16 (11 am to 4 pm) every day, Monday to Sunday, with a few exceptions - please see below. For opening hours in Alta, please also see below. Closed We are closed: January 1st (New Years Day)Mai 17th (National Day)December 24th, 25th and 26th December 31st (New Years Eve) Summer The Science Centre has extended opening hours in the summer. From June 19th to August 19th we are open every day from 10 - 17 (10 am to 5 pm). Normal opening hours the rest of the year are 11 - 16. Alta Opening hours for the Science Centre in Alta will be listed here.