Frederik Kaiser (Amsterdam, 10 June 1808 –Leiden, 28 July 1872) was a Dutchastronomer.[1]He was director of theLeiden Observatory from 1838 until his death.
He is credited with the advancement of Dutch astronomy through his scientific contributions of positional measurements, his popularization of astronomy in theNetherlands, and by helping to build a state-of-the-artobservatory in 1861. Today it is known as the "Old Observatory").Among his students wereJean Abraham Chrétien Oudemans,Johannes van der Waals,Hendricus Gerardus van de Sande Bakhuyzen andHendrik Antoon Lorentz.
Kaiser made a series of drawings ofMars at its opposition in 1862 and made a fairly precise determination of itsrotational period by comparing his drawings with those ofChristiaan Huygens.
Craters onMars[2] and on theMoon are named in his honour, as well asasteroid1694 Kaiser.
InRichard Proctor's now-abandoned Martian nomenclature,Syrtis Major Planum was called the "Kaiser Sea". This nomenclature was later dropped in favor of the one introduced byGiovanni Schiaparelli.
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.[3]
Media related toFrederik Kaiser at Wikimedia CommonsLike many of his foreign contemporaries, Kaiser concentrated his research on positional astronomy.
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