Sunday, November 22, 2015

Moon dog

On Oct. 24th, 2015, I saw my second ever moon dog. A moon dog is the same phenomenon as a sun dog but the light source is the moon instead of the sun. Moon dogs are more rare than sun dogs:

  • The moon is dimmer, so the effect is less noticeable.
  • At least half the time, the moon is in a phase that is less than half full, so it provides too little light to observe the prism effect
In the following photos, the moon is on the right and is over-exposed. The moon dog is the splash of light and color near the tree. Also visible in the pictures is the 22-degree ice halo that is commonly seen around the sun and moon:


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