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Affichage des articles dont le libellé est ASTRONOMY - Noctilucent Clouds over Florida. Afficher tous les articles
Affichage des articles dont le libellé est ASTRONOMY - Noctilucent Clouds over Florida. Afficher tous les articles

13/07/2024

ASTRONOMY - Noctilucent Clouds over Florida

 2024 July 9

A dawn sky is shown that is black at the top and brown near the 
horizon. Wispy clouds converge on the right turning from a white to a
blue hue. Near the apex of this convergence is a crescent moon. 
Please see the explanation for more detailed information.

Noctilucent Clouds over Florida
Credit & Copyright: Pascal Fouquet

Explanation: These clouds are doubly unusual. First, they are rare noctilucent clouds, meaning that they are visible at night -- but only just before sunrise or just after sunset. Second, the source of these noctilucent clouds is actually known. In this rare case, the source of the sunlight-reflecting ice-crystals in the upper atmosphere can be traced back to the launch of a nearby SpaceX rocket about 30 minutes earlier. Known more formally as polar mesospheric clouds, the vertex of these icy wisps happens to converge just in front of a rising crescent Moon. The featured image -- and accompanying video -- were captured over OrlandoFloridaUSA about a week ago. The bright spot to the right of the Moon is the planet Jupiter, while the dotted lights above the horizon on the right are from an airplane.

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