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1.2 What it is not

But I must also point out what PP3 is not. It cannot help you to professionally prepare your next observation night, nor is PP3 a visualisation tool for astronomical databases, with pop-up window information for every sky object on the screen.

In fact, PP3 not even has a graphical user interface. So don't expect any windows at all, and your mouse will be useless. Instead, PP3 reads from one file and writes to another file. (This is done not only because its author was lazy but because it increases efficiency, too.) So, the program itself is quite stinted, but its results are worth it!