Twinkling Lights

In many countries, December is a time of twinkling lights, holiday decorations, and good cheer. Some city displays seem to challenge the night sky.

I have to admit, I love holiday lights especially the white ones. Even knowing about wavelengths, the way light travels, and all the rest of the science doesn't dim the magical feeling that a light display offers after dark.

Ever wonder how those lights would look on a large scale? A NASA-NOAA satellite gives us a much broader view of the Earth at night. Check it out.  

Earth at night