| Bert Sprang|
Bert van Sprang Wikipedia
Bernardus Wilhelmus Maria "Bert" van Sprang (20 June 1944, Tilburg – 17 November 2015, Pijnacker) was the founder of the Dutch youth division ("JWG", or Jongerenwerkgroep) of the Dutch association of meteorology and astronomy ("NVWS", or Nederlandse Vereniging voor Weer- en Sterrenkunde) in 1967. Activities carried out by Van Sprang for the JWG included the organization of astro camps, the setting up of a program to build telescopes cheaply, and the writing of many booklets on astronomy topics. He was also program leader of the planetarium in The Hague until it was destroyed by fire in February 1976. The main-belt asteroid 3098 van Sprang was named after him.