http://www.worldwidetelescope.org/Home.aspx
" WorldWide Telescope Eclipse Release Candidate now Available (July 8, 2013)
Eclipse Release Candidate is here! The WWT Eclipse Advanced Release now supports DirectX11 and can run as a 64 bit application. At the IPS (International Planetarium Society) meeting in Baton Rouge, LA Microsoft Research previewed the WorldWide Telescope Eclipse release. Now you can explore the new features of WWT Eclipse in your planetarium. Try the new MIDI controller support, or the new atmospheric shaders, or one of the many new grid, overlay & text options and full dome tour authoring."
