Sterrewacht Leiden
The homepage of the Leiden Observatory.

Universiteit Leiden
The homepage of  the  University of Leiden.

De Leidsche Flesch
Student association for Astronomy, Physics, Mathematics and Computer Science

Werkgroep Leidse Sterrewacht
The homepage of Werkgroep Leidse Sterrewacht.

Vereniging van Oud-Sterrewachters
The homepage of Vereniging van Oud-Sterrewachters. (for alumni)

Mobiel Planetarium
Planetarium for Astronomy on every location.

Stichting RINO
The Physics roadshow from Leiden.

Eureka! Home Page
The magazine of the faculty of the University.

Lente Lezingen
Yearly lectures of Astronomy in Leiden.