You are downloading the Constellations XAP file v18.104.22.168 for Windows Phone. Constellations is a free and useful Education app: Take a tour of the constellations to find out about their names and where they are. Then try some of the quizzes to see if you can pick them out on ... You can now download the offline XAP file to install & try it.
Download Locations for Constellations 22.214.171.124 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Constellations XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.