I'm certainly no expert regarding this and I too had the same problem. All I can tell you is to go through each of these steps (don't skip any and read carefully and maybe do it after you've slept). That's what I did to get it to work:

1.) Go to Applications Manager --> UnInstall and make sure there is not a copy of Stellarium installed. If so, uninstall.

2.) Enable Extras-Devel Repository (proceed at your own risk)

3.) In Terminal as root, run:

apt-get install libqt4-maemo5-core libqt4-maemo5-opengl libqt4-maemo5-network libqt4-maemo5-gui libqt4-maemo5-script libqt4-maemo5-svg libqt4-maemo5-test libqt4-maemo5-xml libqt4-maemo5-dbus libgles1 libgles1-sgx-img libgles2 libgles2-sgx-img opengles-sgx-img-common

4.) cd MyDocs/.documents/downloads

5.) dpkg -i stellarium_0.10.3r4182-1_armel.deb

Good luck!