Another good visualization of the news universe is this graphic by Vanessa Otero, which focuses on where news sources fall on the current political spectrum.
Spot Fake News
Check Your Source Before You Wreck Your Source
AllSides Media Bias Ratings
It is not “accurate” – there is no such thing as an accurate measure of media bias – but it does provide readers a sense of the political leanings of the source.
FactCheck.org A project of the Annenberg Public Policy Center of the University of Pennsylvania that monitors accuracy of "what is said by major U.S. political players in the form of TV ads, debates, speeches, interviews and news releases."