http://www.addictinginfo.org/2015/02/17/americans-were-asked-a-simple-science-question-their-answers-will-make-you-laugh-or-cry-video/
"Shockingly, 1 in 4 believed that the Sun orbits the earth.
To put this level of scientific understanding in perspective, the idea that the earth and planets revolve around the Sun has been accepted by scientists and much of the civilized world since the 16th century. Over four hundred years later, a quarter of Americans still haven’t found this fact out."