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moon dogs.
Paraselenes. These are like sun dogs, only visible at night near the moon. They are bright rainbow-like spots that appears on either side of the moon during certain atmospheric conditions.
Les Cowley has posted a quite striking photograph of one on his web site, Atmospheric Optics. It offers a lot more detail than I have here. |
1. Cowley, Les. 2000. Parhelia (Sun Dogs). Atmospheric Optics. Accessed Sept 8 2001 from http:// www.sundog.clara.co.uk/ halo/ pmoon3.htm |