Venus, Meteorology and the Jacobus Kapteyn Telescope
Published in Gemini 20, 12-13 in 1988
G. P. Können and J. Tinbergen
An account is given about our attempts at La Palma Observatory to detect ice crystals in the Venus's atmosphere, including the drawback of a temporary instrumental malfunction and our subsequent fortune that we got the opportunity to scan a terrestrial halo in a Venus-spoiling cirrus deck.