Astronomy on the Desktop

“The other way Stellarium can interact with the real world is as
a planetarium. Stellarium can handle the calculations involved in
projecting over a sphere. This way, you can make a DIY planetarium.
You need a dome onto which you can project your display across the
inside.

You also need a video projector and a spherical security mirror.
Use the spherical distortion feature in Stellarium and then project
the results through the video projector and onto the mirror. Then,
you can lie back under the dome and see the sky above you. The
Stellarium Web site has links to groups on the Internet where you
can find help and hints when building your own planetarium.

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