A news analysis is an evaluation of a news report that goes beyond the represented facts and gives an interpretation of the events based on all data. It is an effort to give context to the occurrence of the event.
News traditionally is supposed to relay news in an objective manner covering the who, when, where, why and how. An analysis discusses the news from all angles, gives perspective and addresses consequences.
It is generally done by an expert on the subject and is presented as a corollary to the actual news. A news analysis is generally the opinion of the expert and can be different from the position of the newspaper or the reporter.