August 28, 2013
Billions of years of cosmic evolution — the birth and death of stars, the slow coalescence of planets, the patient unfolding of life — all...
A Retreating Thunderstorm at Sunset
Birthday · August 28, 2013
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APOD published August 28, 2013. Credit: Alan Dyer (The Amazing Sky). A publication-date match, not a photo taken on your date. Independent of NASA.
What type of cloud is that? This retreating cumulonimbus cloud, more commonly called a thundercloud, is somewhat unusual as it contains the unusual bumpiness of a mammatus cloud on the near end, while simultaneously producing falling rain on the far end. Taken in mid-June in southern Alberta, Canada, the cloud is moving to the east, into the distance, as the sun sets in the west, behind the camera. In the above image, graphic sunset colors cross the sky to give the already photogenic cloud striking orange and pink hues. A darkening blue sky covers the background. Further in the distance, a rising, waxing, gibbous moon is visible on the far right.
Image credit: Alan Dyer (The Amazing Sky)