Nicolaas Roos Postdoc / guest Name Dr. N. Roos Telephone +31 71 527 5737 E-mail nico.roos@hccnet.nl Postdoc / guest Science Sterrewacht Sterrewacht Work address Oort Niels Bohrweg 2 2333 CA Leiden Contact +31 71 527 5737 nico.roos@hccnet.nl