Polar stratospheric clouds or PSCs also called nacreous clouds are iridescent clouds that appear in the polar stratosphere in the winter at altitudes of 15,000–25,000 meters (49,000–82,000 ft). They have a connection with breaking up the ozone layer, but they are pretty spectacular.
As you can see by these pictures, last week in the high winds the 50 meter tower fell down. Very sad, I still can't really believe that it fell.
