Bachelor from non-top-university lowering chances?

[Tom83B]

Hi, I was recently thinking that if I want to get PhD one day, it would be useful, if it was from a very good university. However, I live in Czech Republic and I'm afraid that doing my bachelors degree here (http://www.topuniversities.com/university-rankings/world-university-rankings/2010/subject-rankings/natural-sciences - 134 - Charles University) (which I would prefer) could ruin me the chance of being admitted to any of the top universities, let's say top 20. Since it's in Europe I can do my bachelors degree here, masters at a better university and hope it helps me.
Do you think that I should aim for a better universtity right away for a bachelors degree or is this fine for my plans?

 

[Ryker]

The best university in my country is ranked even lower (it is top 500), and people who studied Physics there have gone on to work for NASA or do a PhD at MIT, a guy who studied study computer science went to do his PhD at Carnegie Mellon and then got (assistant) professorship at Stanford etc. From the interviews I've read with those people they've all done a great amount of research and were greatly involved in Physics/CS in general, so you do have to be really good to get in. But it's the same at better universities, the difference perhaps being that it's a dog eat dog world earlier on.

 

[Tom83B]

Thanks. This information is really helpful.