Showing posts with label lunar halo. Show all posts
Showing posts with label lunar halo. Show all posts

Wednesday, August 29, 2012

the gibbous moon tints


the gibbous moon tints
 the banner of crystal clouds 
with a pink halo

The gibbous moon nestles like an ostrich egg in a circle of pink and white down. How quickly the high cirrus clouds slip away, while the much higher moon continues her slow ascent across the cobalt canopy. The Earth-born Moon, like a grown child, long ago moved away from her mother, but not too far. They remain connected by such a strong, invisible umbilical cord that the Moon never turns her face away from her mother. The clouds are also Earth-born, as is the atmosphere which they inhabit, but they hug their mother closely, afraid of the great emptiness beyond.

Tuesday, November 8, 2011

ring around the moon


ring around the moon
peeking through a mackerel sky -- 
rain is on the way


On a clear evening, a gibbous moon with a pink halo winks on and off as a fleet of cottonball clouds pass by. There's an old saying: "Ring around the moon means rain soon." And sure enough, the next day a long, hard rain fell for the first time in many moons.
          A dappled patch of tiny individual cloudlets at high altitude is called cirrocumulus. Sometime the little cloudlets look like fluffy fish scales, giving the appearance of a "mackerel sky." Cirrocumulus usually move from west to east and indicate unsettled weather on the way. These high clouds contain millions of tiny ice crystals and the halo around the moon is caused by light glinting from the ice crystals. 
          Like a rainbow, a lunar halo depends on the viewer's perspective. The halo you see will not be the same as the one for the person standing next to you because the particular group of ice crystals is different for each person. Since moonlight is not very bright, lunar halos are mostly colorless, though some, like this one, are reddish on the inside and bluish on the outside. Without the cloud cover, the inner edge of the halo would appear sharp and the outer edge diffuse. 
          My personal halo looks like a pink pearl inside an oyster shell. What does it look like to you?