Wikipedia

Wikipedia is an open source, online free encyclopedia that anyone can use and edit. Here is the URL so you can visit: http://en.wikipedia.org/wiki/Main_Page I really recommend many visits here to find information on just about anything, it has over 1 million articles and is growing. I have been using it to research astronomy issues, like the definition of a planet. So many useful tools are available on the Internet like blog spaces and wikipedia that the goal of a net-centric life is coming true.