The Virtual Observatory and its Benefits for Amateur Astronomers
  The contemporary astronomical instruments have been producing the unprecedented amount of data. The largest part of this "data avalanche" is being produced by deep all-sky surveys yielding terabytes of raw data per night. Such a great data volumes can hardly even been reduced by automatic pipelines running on supercomputer grids but it is impossible to exploit fully their content by a small group of professional astronomers in the interested research teams. New tools for collaborative work with heterogeneous data sets spread over distant servers are being developed in the framework of the Virtual Observatory (VO). As many VO resources are freely available on the Internet, a new opportunity opens for the amateur astronomers to do professional research using these tools in an Internet browser on a moderately fast connection. We give short overview of current and future sky surveys producing data on a millions of targets - hence the term Megasurveys, and we introduce the basic principles of Virtual Observatory and its current applications 
Petr \v{S}koda
astro-ph.IM