Opening hours
During public holidays and school vacations other (extra) opening hours than usual may apply.
| Monday | closed |
| Tuesday | 10:00 – 17:00 |
| Wednesday | 10:00 – 17:00 |
| Thursday | 10:00 – 17:00 |
| Friday | 10:00 – 17:00 |
| Saturday | 10:00 – 17:00 |
| Sunday | 10:00 – 17:00 |
| 16 February 2026 | 10:00 – 17:00 |
| 6 July 2026 | 10:00 – 17:00 |
| 13 July 2026 | 10:00 – 17:00 |
| 20 July 2026 | 10:00 – 17:00 |
| 27 July 2026 | 10:00 – 17:00 |
| 3 August 2026 | 10:00 – 17:00 |
| 10 August 2026 | 10:00 – 17:00 |
| 17 August 2026 | 10:00 – 17:00 |
| 24 August 2026 | 10:00 – 17:00 |
| 19 October 2026 | 10:00 – 17:00 |
| 21 December 2026 | 10:00 – 17:00 |
| 28 December 2026 | 10:00 – 17:00 |
| Good Friday – 3 April 2026 | 10:00 – 17:00 |
| Easter Sunday – 5 April 2026 | 10:00 – 17:00 |
| Easter Monday – 6 April 2026 | 10:00 – 17:00 |
| King’s Day – 27 April 2026 | closed |
| Liberation Day – 5 May 2026 | 10:00 – 17:00 |
| Ascension Day – 14 May 2026 | 10:00 – 17:00 |
| Whit Sunday- 24 June 2026 | 10:00 – 17:00 |
| Whit Monday- 25 June 2026 | 10:00 – 17:00 |
| Christmas Eve – 24 December 2026 | 10:00 – 16:00 |
| Christmas Day – 25 December 2026 | closed |
| Boxing Day – 26 December 2026 | 10:00 – 16:00 |
| New Year’s Eve – 31 December 2026 | 10:00 – 16:00 |
| New Years day – 1 January 2027 | closed |
Opening hours Louwman Historic Telescopes
The Louwman Historic Telescope exhibition is open every first Friday of the month from 10:00 to 17:00 hrs. For groups, please make an appointment.