You are downloading the Astroller XAP file v220.127.116.11 for Windows Phone. Astroller is a free and useful Education app: Now with ISS (International Space Station) tracking in the full version! Astroller is a beautiful, real-time guide to the night sky. Point your phone ... You can now download the offline XAP file to install & try it.
Download Locations for Astroller 18.104.22.168 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Astroller XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.