In online media, Planet is a feed aggregator application designed to collect posts from the weblogs of members of an Internet community and display them on a single page. Planet runs on a web server. It creates pages with entries from the original feeds in chronological order, most recent entries first.
Websites that aggregate posts from different blogs using Planet or similar software are known as planets themselves. Such sites are commonly associated with free and open source software projects, where they are used to collect posts from the various developers involved in projects.