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| Eleven years in the life of the Sun, spanning most of solar cycle 23, as it progressed from solar minimum to maximum conditions and back to minimum (upper right) again, seen as a collage of ten full-disk images of the lower corona. Of note is the prevalence of activity and the relatively few years when our Sun might be described as “quiet.” Credit: SOHO EIT, ESA/NASA |
National Science Foundation (NSF) conducted a survey to 2,200 people in America. The result: 26 percent of Americans didn't know that the "Earth revolve around the Sun." And 39 percent knew that the "universe began in a huge explosion."
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