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 |
| 27 February 2023 | 10:00 – 17:00 |
| 1 May 2023 | 10:00 – 17:00 |
| 10 July 2023 | 10:00 – 17:00 |
| 17 July 2023 | 10:00 – 17:00 |
| 24 July 2023 | 10:00 – 17:00 |
| 31 July 2023 | 10:00 – 17:00 |
| 7 August 2023 | 10:00 – 17:00 |
| 14 August 2023 | 10:00 – 17:00 |
| 21 August 2023 | 10:00 – 17:00 |
| 28 August 2023 | 10:00 – 17:00 |
| 16 October 2023 | 10:00 – 17:00 |
| 10:00 – 17:00 |
| Good Friday – 7 April 2023 | 10:00 – 17:00 |
| Easter Sunday – 9 April 2023 | 10:00 – 17:00 |
| Easter Monday – 10 April 2023 | 10:00 – 17:00 |
| King’s Day – 27 April 2023 | closed |
| Ascension Day – 18 May 2023 | 10:00 – 17:00 |
| White Sunday- 28 May 2023 | 10:00 – 17:00 |
| White Monday- 29 May 2023 | 10:00 – 17:00 |
| Christmas Eve – 24 December 2023 | 10:00 – 16:00 |
| Christmas Day – 25 December 2023 | closed |
| Boxing Day – 26 December 2023 | 10:00 – 16:00 |
| New Year’s Eve – 31 December 2023 | 10:00 – 16:00 |
| New Years day – 1 January 2024 | 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.