You are downloading the SkyMap XAP file v188.8.131.52 for Windows Phone. SkyMap is a free and useful Travel app: SkyMap is an amazing planetarium for your windows phone. It enables you to point your phone at the sky and see what stars, constellations, planets or ... You can now download the offline XAP file to install & try it.
Download Locations for SkyMap 184.108.40.206 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline SkyMap XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.