Sideralis is a magnificent application to learn about the constellations, the stars, planets… from our Nokia N97. If you like the astronomy you may not miss this application.
I was surprised the database that has Sideralis and the number of options that we can find. Among their options we can find the option of information where we can learn quite about astronomy.
In its official page is the latest official version, the v1.3.0, and the latest beta, the v1.3.7 b344, but i recommend to you to install
this version, the 1.3.6 b292 
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