Halo Around Moon
An extremely bright, clearly-outlined halo was visible round the moon in Christchurch on Wednesday evening. The halo was caused by the diffraction of light through small droplets of water or ice high in the atmosphere and the exceptional clarity was caused by the brightness of the moon which was nearly full. The president of the Canterbury Astronomical Society (Mr C. H. Rowe) said that the halo was an indication of high cloud over the city. Its size depended on the diameter of the water-drops: the smaller the drops the larger the halo. The clear outline of the halo indicated that the drops were of a uniform size. It was a meteorological phenomenon which could happen at any time of the year, he said.
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https://paperspast.natlib.govt.nz/newspapers/CHP19700522.2.210
Bibliographic details
Press, Volume CIX, Issue 32303, 22 May 1970, Page 18
Word Count
126Halo Around Moon Press, Volume CIX, Issue 32303, 22 May 1970, Page 18
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Acknowledgements
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