One of my favorites is http://johncarlosbaez.wordpress.com/2012/12/27/our-galactic-... which describes our galactic neighborhood. Everyone knows that Alpha Centauri is our nearest star. But I bet you don't know a lot more about it. It is a much more complex place than I had realized.
See http://en.wikipedia.org/wiki/John_C._Baez for some basic background. See http://math.ucr.edu/home/baez/ for more articles from him if you enjoyed this one.
One of my favorites is http://johncarlosbaez.wordpress.com/2012/12/27/our-galactic-... which describes our galactic neighborhood. Everyone knows that Alpha Centauri is our nearest star. But I bet you don't know a lot more about it. It is a much more complex place than I had realized.