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 |
| 24 February 2025 | 10:00 – 17:00 |
| 28 April 2025 | 10:00 – 17:00 |
| 7 July 2025 | 10:00 – 17:00 |
| 14 July 2025 | 10:00 – 17:00 |
| 21 July 2025 | 10:00 – 17:00 |
| 28 July 2025 | 10:00 – 17:00 |
| 4 August 2025 | 10:00 – 17:00 |
| 11 August 2025 | 10:00 – 17:00 |
| 18 August 2025 | 10:00 – 17:00 |
| 25 August 2025 | 10:00 – 17:00 |
| 13 October 2025 | 10:00 – 17:00 |
| 20 October 2025 | 10:00 – 17:00 |
| 22 December 2025 | 10:00 – 17:00 |
| 29 December 2025 | 10:00 – 17:00 |
| Good Friday – 18 April 2025 | 10:00 – 17:00 |
| Easter Sunday – 20 April 2025 | 10:00 – 17:00 |
| Easter Monday – 21 April 2025 | 10:00 – 17:00 |
| King’s Day – 26 April 2025 | closed |
| Ascension Day – 29 May 2025 | 10:00 – 17:00 |
| White Sunday- 8 June May 2025 | 10:00 – 17:00 |
| White Monday- 9 June 2025 | 10:00 – 17:00 |
| Christmas Eve – 24 December 2025 | 10:00 – 16:00 |
| Christmas Day – 25 December 2025 | closed |
| Boxing Day – 26 December 2025 | 10:00 – 16:00 |
| New Year’s Eve – 31 December 2025 | 10:00 – 16:00 |
| New Years day – 1 January 2026 | 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.