Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Arjen Roelofs (1 March 1754, Hijum - 11 May 1828, Hijum) was a Dutch astronomer. Roelofs was born on the Hommema-sate (estate) near Hijum in Friesland, as the youngest of four sons and two daughters. His father was Roelof Pytters, a tenant farmer and tax receiver. His mother was Neeltje Alberts from Finkum. The oldest son Klaas trained as a steersman, but did not work as one, and instead became a doctor in Sexbierum. The other sister Lisbeth married and left the household. It was not an easy life on the farm, but this is where the other three boys, Pieter, Albert and Arjen had to work. Their mother stimulated the interest of the three sons in mathematics and science, however their father was unhappy with this.

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