| Titels | Prof. dr. |
| Initials | H. |
| Main position | Emeritus hoogleraar UL / oud Directeur-generaal ESO |
| Disciplines | Astronomy, astrophysics |
| Domain | Natural Sciences and Engineering |
| Membership | Member |
| Since | 1979 |
| Member of Natural Sciences and Engineering |
| Titels | Prof. dr. |
| Initials | H. |
| Main position | Emeritus hoogleraar UL / oud Directeur-generaal ESO |
| Disciplines | Astronomy, astrophysics |
| Domain | Natural Sciences and Engineering |
| Membership | Member |
| Since | 1979 |
| Member of Natural Sciences and Engineering |