On July 27, 2018, the Moon passed through the shadow of our planet, producing the longest lunar eclipse of the century. The face of the Moon turned red for 1 hour and 43 minutes--an event visible from every continent except North America. Anthony Ayiomamitis photographed the eclipse from Athens, Greece:
"We were very fortunate to have pristine skies for this evenings longest total lunar eclipse of the 21st century," says Ayiomamitis.
In the composite image, above, Anthony sandwiched an image of the all-red totally eclipsed Moon between images of the Moon just before and after totality. Note the fringes of pale blue in those outer Moons.
The blue color is caused by ozone. Atmospheric scientist Richard Keen of the University of Colorado explains: "Most of the light illuminating the Moon passes through the stratosphere, and is reddened by scattering. However, light passing through the upper stratosphere penetrates the ozone layer, which absorbs red light and actually makes the passing light ray bluer." This creates a turquoise-blue border around the red.
www.spaceweather.com
In the composite image, above, Anthony sandwiched an image of the all-red totally eclipsed Moon between images of the Moon just before and after totality. Note the fringes of pale blue in those outer Moons.
The blue color is caused by ozone. Atmospheric scientist Richard Keen of the University of Colorado explains: "Most of the light illuminating the Moon passes through the stratosphere, and is reddened by scattering. However, light passing through the upper stratosphere penetrates the ozone layer, which absorbs red light and actually makes the passing light ray bluer." This creates a turquoise-blue border around the red.
www.spaceweather.com
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