City lights at night, from space
Astronauts photograph cities and discuss the lights, patterns, cultures.
I am cleaning out my reader and found this gem. Blake Stacey at Science After Sunclipse posted it 3 weeks ago. It takes 10 minutes, and the opening minute or so is a bit dull, so be prepared. After that, though, wow. Well worth it. Much more detail than the satellite images we are used to.
Blake has a nice discussion you can read.