You are downloading the Messier Catalog XAP file v184.108.40.206 for Windows Phone. Messier Catalog is a free and useful Books & Reference app: Messier Catalog is App of The Day on myAppFree, don't miss your daily deals http://get.myappfree.itMessier Catalog application for Windows ... You can now download the offline XAP file to install & try it.
Download Locations for Messier Catalog 220.127.116.11 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 Messier Catalog XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.