Nothing to do with WW2, but might interest some who like the odd dash of astronomy.
Don't know if it's new, or I just hadn't noticed, but Google earth now has a celestial objects mode. Clicking 'switch between Sky & earth' on the menu bar:
(or View>Switch to Sky/Earth)
brings up a scrollable interactive view from the earth of our stars, constellations etc. Lots of further features explained in the help file.