| Astronomie | Vakanties | |
| Holland | Rome 2005 | |
| Australia | Barcelona 2007 | |
| Austria | Berlijn 2008 | |
| England Observatory Greenwich | Moskou & St. Petersburg 2008 | |
| Czecholovakia | España 2008 | |
| Berlin | España 2009 | |
| España Observatoire Sierra Nevada | Norway 2009 | |
| France Observatoire de Haute Provence | London 2009 | |
| France Observatoire Pic du midi Pyreneeën | Singapore 2010 | |
| France Observatoire Hôtel de Cluny Paris | Australië 2010 | |
| Italy | Marokko 2011 | |
| Lichtenstein | Parijs 2011 | |
| Norway | ||
| Russia |