On August 21, 2017, millions across the United States will witness an amazingly rare and wondrous spectacle of nature—a total eclipse of the sun. 
The Great American Total Solar Eclipse will darken skies all the way from Oregon to South Carolina—a stretch of land about 70 miles (113 kilometers) wide. This has not occurred since 1776.
Many communities are hosting “eclipse parties” at museums, observatories, parks, open fields, and back yards. Schools that are in session are preparing a variety of lessons to make the most of the eclipse experience while keeping the kids safe with protective eyewear and adult supervision. Other districts called an inclement weather day so children would not be outside unattended during the eclipse.
Astronomy and astrophysics graduate student at the University of Arizona, Noah Rivera said, “The eclipse is of particular importance to my department. Multiple astronomy professors plan to view the eclipse at more desirable locations outside of Tucson, which has led my first day of class to be rescheduled.
“Science is experienced in everyday life. Interest in it shouldn’t be restricted to the odd day in which the stars align. I’d encourage anyone fascinated with the eclipse to follow-up their excitement by grabbing a book from the library to learn more about our universe.” 
What is a Total Solar Eclipse?
A total solar eclipse happens when the moon’s shadow will completely cover the sun on Earth, fully or partially blocking the sun’s light in some areas. If a solar eclipse is total at any point on Earth, it is called a total solar eclipse, even though it’s seen as a partial solar eclipse in most areas.
Observers within