http://www.newsweek.com/sunspot-visible-naked-eye-large-four-earths-1774426 > One of the sunspots facing the Earth is now so large that it can be seen with the naked eye—with proper viewing protection, of course. > The sunspot, AR3190, is around four Earths in diameter, according to an infographic on SpaceWeather.com made by Bum-Suk Yeom from Iksan, South Korea, and is twice as large as any of the other sunspots currently facing in our direction.