A preview of new features coming soon:
I've overlaid the Sharpless, RCW, Gum and Westerhout catalogs on top of Douglas Finkbeiner's full sky hydrogen-alpha map. You will be able to zoom into the hydrogen-alpha image and arrive at about 35 subimages with commentary. This is a huge new section of the site and has taken weeks to put together.
There was a problem with the B-class star display in the last upload of the map (they are displayed as blue crescents instead of blue balls). I'll be fixing that and adding a new option to display large map windows (720x720 pixels as well as the current 360x360 pixels).