This website is not under construction.  It is so ancient that it doesn't even serve cookies or ads.  No 25-year itch for “classic” to “new” revamp here!  It has been more or less like this since 1995 when I started it to offer my radiative transfer course notes - which did not change much either.  Subtract What's past? from What's new? for the evolution.  Please inform me about not working links.

The content of my pages is available under the Creative Commons BY-SA 4.0 license. I allow use of my texts and images within the conditions of this license, for example for use in free encyclopedias as Wikipedia.  I take no responsibility whatsoever for use of my material or material from others that my pages present or link to.  The same conditions apply to the photographs of Hans Nieuwenhuijzen on this website who requested me to post them here.

Serving this website and Rob van Gent's astronomy history pages is the only remaining activity of Utrecht University in astronomy after pursuing this field during 1642 - 2011.  To study astronomy in The Netherlands you must go to Amsterdam, Groningen, Leiden, or Nijmegen.  To become a solar physicist you better go to Göttingen, Oslo, Stockholm, La Laguna.

Verantwoording:  ik jatte "webstek" niet van onnavolgbare Interim Dichter des Vaderlands Simon Vinkenoog (1928-2009) maar van onnavolgbare collega-sterrenkundige Vincent Icke.

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height=8mm}   Micro$oft free,  long live Linux, LaTeX, and latex2html.