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Proceedings Paper • Open Access

Optics in the atmosphere: what happened in the skies of St. Petersburg on 18 June 1790
Author(s): Robert G. Greenler

Paper Abstract

There is a published, eyewitness record of a complex display of circles, arcs, and spots of light in the sky over St. Petersburg in 1790. The display can be explained as resulting from the reflection and refraction of light by small, air-borne ice crystals

Paper Details

Date Published: 1 March 1992
PDF: 11 pages
Proc. SPIE 1603, Education in Optics, (1 March 1992); doi: 10.1117/12.57868
Show Author Affiliations
Robert G. Greenler, Univ. of Wisconsin/Milwaukee (United States)


Published in SPIE Proceedings Vol. 1603:
Education in Optics
Gregory B. Altshuler; Brian J. Thompson, Editor(s)

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