He is credited with the advancement of Dutch astronomy through his scientific contributions of positional measurements, his popularization of astronomy in the Netherlands, and by helping to build a state-of-the-art observatory in 1861 (Today it is known as the "Old Observatory").
Kaiser's parents were Johann Wilhelm Keyser and Anna Sibella Liernur but he was raised by his uncle Johan Frederik Keyser from the age of eight.
- Petra van der Heijden Frederik Kaiser (1808-1872) and the modernisation of Dutch astronomy[dead link]
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