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Remote Sensing

NASA maps night-shining clouds

Space.com
18 December 2009

A NASA satellite has created a new map of so-called "night-shining clouds," which form at high altitudes on Earth and glow even after the sun sets.

These mysterious clouds, also called noctilucent clouds or Polar Mesospheric Clouds (PMCs), appear about 50 miles (80 km) above Earth's surface during the summer of each hemisphere - from late May through late August in the north, and from late November to late February in the south.

Full story from Space.com
Related article from SPIE Newsroom: Noctilucent clouds: research at the edge of space