How Does Google News Work ?

How does Google News works ?? Do they take use rss feeds of the news websites and then sort ? in that case do they always print the news only from the website whose rss feeds they have added in their system? or there's something else ?
Can someone please give an idea about their alogorithm ??

have you read the "About Google News" page they have?

http://forums.xisto.com/no_longer_exists/

Google News is a computer-generated news site that aggregates headlines from more than 4,500 English-language news sources worldwide, groups similar stories together and displays them according to each reader's personalized interests.

 

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Our articles are selected and ranked by computers that evaluate, among other things, how often and on what sites a story appears online. As a result, stories are sorted without regard to political viewpoint or ideology and you can choose from a wide variety of perspectives on any given story.

https://support.google.com/news/?visit_id=0-636172734841137564-2286341688&rd=2

the publisher help page may also enlighten you on your query:

https://support.google.com/news/publisher/

and specifically, on how does Google News get articles from a news site:

https://support.google.com/news/publisher/?answer=40392

Google News gathers articles by crawling online news sites. Please be aware that were currently unable to accept individual articles, and that we cant crawl RSS or Atom feeds. If your content appears on an HTML website and youd like it to be included in Google News, please contact us and well review your site.

hope it helps.

Isnt google news still in Beta development? Looks great already and works great, but i believe even gmail is istill in beta dev.