This is the source repository for Sky Map. You should see the following three directories:
To build SkyMap, you need to have install 'ant' and have downloaded a
version of the Android SDK. Then, change to the app directory and create a
local.properties file containing the location of your Android SDK. It
should have a single line that looks like this:
sdk.dir=
Executing 'ant clean debug' will build the binary. It will be located in the bin directory and will be named Stardroid-debug.apk. Make sure that your device can handle binaries that don't come from the market, and you should be good to go.