When the sun goes dark: 5 questions answered about the solar eclipse

Last Day to Order Eclipse Glasses from Amazon Via Ground Shipping

Stores across Lexington are reporting that they are out of eclipse glasses and aren't sure when they will get more in stock. It will take approximately 94 minutes for the moon's shadow to make the cross country trip. Petro says observations of the sun during totality will also allow scientists to study the solar corona.

The mechanism that blocks out the sun in a coronagraph also obstructs views of the sun's atmosphere closer to its surface, McCall said. Using those equations, we can calculate tables of data that can predict what we will see on Earth, depending on location, during an eclipse as well as when they will happen and how long they last. If weather is cloudy, most viewing events will provide a live NASA stream of the eclipse inside.

Sir Arthur Eddington, an astronomer who helped further the study of general relativity and whose work is a major piece of our modern understanding of stars and black holes, used the darkness provided by a solar eclipse to look at the position of the stars' light during the day, when it passed the sun.

Nashville is the largest city in the path of the eclipse, and specialists at the Vanderbilt Eye Institute want to ensure that eclipse watchers across Middle Tennessee keep an eye on safety while viewing the astronomical event.

Certified eclipse glasses are fine to look though unless they're scratched, punctured, torn or otherwise damaged. The bureau is one of the first stops many visitors will be making in the weekend leading up to the eclipse. There's also a viewing party at Neuseway Planetarium in Kinston. "So the sun is much more risky in that situation than it would be ordinarily". Previous studies observed animal behavior during an eclipse in 2001 and noted some animals went through their night routines as the sun disappeared while others became nervous.

"If you stood still, you should see an eclipse about once every 150 years, so this is less than a 1 percent chance", Adler's Ciupik said. Cheap knock-offs are being sold in stores and online.

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At first, AAS said people should look for the ISO 12312-2 label on their glasses, but recent counterfeits have contained that label even though they were not safe, Mashable reported.

Eclipse glasses are the only safe way to watch the eclipse, according to the American Astronomical Society.

"This eclipse was in my high school astronomy books from the 1980s".

Books-A-Million and Toys R Us in Knoxville, along with Lowe's in Harriman say they may get more in next week. If you glance at the sun through your glasses, for example, and find it uncomfortably bright, out of focus and surrounded by a murky haze, they're no good.

Bob Baer, a Southern Illinois University physics professor, will be taking telescopic images of the eclipse in Carbondale as part of a NASA initiative to collect photos from almost 70 sites in the path of totality.

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