Posts: 15,108
   
Threads: 10,608
    
Likes Received: 2,371 in 2,167 posts
Likes Given: 405
Polar stratospheric clouds (also called Nacreous clouds) form at altitudes of 15,000–25,000 meters (49,000–82,000 ft), below the ice sublimation point, usually around −85 °C, best observed during twilight.
(This post was last modified: 20-04-2024, 05:36 PM by
Levin.)
Posts: 10,576
   
Threads: 69
    
Likes Received: 2,341 in 1,983 posts
Likes Given: 226
i remember concorde supersonic jet fly through those cloud