Usenet is a collection of newsgroups. Newsgroups are online forums in which people discuss thousands of different topics. Each topic has its own newsgroup, and many topics are divided into sub-groups.
People post articles to the newsgroups, which anyone with access to the group can read.
Othe r people then post replies to the article. Some of that kind of news is certainly available online. At last count there were just under 16,000 newsgroups available. Most of these will not interest you. Many are local groups for other regions of the world.