AstroSpace
Monday, May 14, 2012
Jan Oort Biography Bibliography
http://en.wikipedia.org/wiki/Jan_Oort
http://www.esa.int/esaSC/SEMBPC2PGQD_index_0.html
http://www.phys-astro.sonoma.edu/brucemedalists/oort/
http://bc.ub.leidenuniv.nl/bc/tentoonstelling/Jan_Oort/inhoud.htm
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