They are actually a rare cloud called nacreous clouds or polar stratospheric clouds, they are also known as mother of pearl due to their iridescent appearance. They occur in the winter polar ...

Because of the height and temperature needed this cloud is also known as polar stratospheric cloud - here's one pictured over Warrenpoint, County Down Rare nacreous clouds have been photographed ...

Professor Toon has helped conceive, develop and lead many NASA airborne field missions aimed at understanding stratospheric volcanic clouds ... processes and improving the parameterizations of ...

A cold wave sweeping through the Arctic brought the rare polar stratospheric clouds within view for at least three days between December 18 and December 20, per the website spaceweather.com.

These phenomena, embedded in the stratospheric haze layers capping the ... For the first time, NASA finds CO2 on Jupiter's moon Jupiter-sized discovery could reshape our understanding of planet ...

Each winter, a blisteringly cold ring of wind rapidly circulates clockwise in the stratosphere ... the polar vortex isn't ...

The ozone hole that forms each year in the stratosphere ... darkness. Polar-circling winds keep cold air trapped above the continent, and sunlight-sparked reactions involving ice clouds and ...