TEXT HERE DOES NOT MATCH WITH PICTURES. NEW TEXT IS UNDER CONSTRUCTION. (This old version is temporarily preserved for own use to help in writing new captions.)
HERE ARE (VERY) OLD SLIDE SCANS. SLIDES WILL BE RE-SCANNED, IMAGES ENLARGED AND NEW SLIDES SCANNED IN FUTURE.
Halos are born when light is refracted or reflected in icecrystals of different shapes. There is no way to make a halo guide here because of the richness of possible forms. Just be observant wherever you are and check your day and night sky whenever there are cirrus-type clouds passing by. Images ha03222 and ha03122 show a 9 degrees' ring (next page) while image ha00954 shows several (anomalous) sun centered rings; ha01323 an ellipsoid halo.
Images hk** show halos around moon and finally hl**** are halos from airplane. Airplane would be a wonderful place to hunt several atmospherical phenomena, so any vacant and cheap seats somewhere...?
ha00211
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ha00444
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ha00451
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ha00531
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ha00623
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ha00644
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ha00731
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ha00734
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ha00942
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ha00954
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ha01042
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ha01113
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ha01232
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ha01323
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ha01354
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ha01822
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ha01911
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ha01912
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ha01914
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ha01931
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ha02143
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ha02211
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ha02221
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ha02223
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ha02244
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ha02311
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ha02332
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ha02354
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ha02431
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ha02453
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hl00142
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hl00234
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