HELP HELP HELP HELP!!!!!!!!!!!

I have bought the solar system app, downloaded it to itunes on my pc and it started copying the app so I went away to wait, when I came back the pc ব্যক্ত that it had copied the app onto my ipad but all it says on my ipad underneath the app প্রতীকী is
'waiting.....'. How do I get it to load on my ipad?