What you need to know about this month's total solar eclipse

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The eclipse will turn day into night along a 140-mile wide path.

"For DSLR cameras, the best way to determine the correct exposure is to test settings on the uneclipsed Sun beforehand". If you were to stare into the sun for more than just a few seconds, you would burn a crater in your retina, much like holding up a magnifying glass on a sunny day and burning holes in leaves or paper.

While Thomas County will not see a total eclipse, expectations are that the moon will cover approximately 90 percent of the sun for a brief period, enough to create a dramatic effect and illustrate the phenomena of an eclipse. I've found that most makeup/compact mirrors work well. It's been described as stunning. It is in these spots that you will want to be if you wish to see the marvelously odd things that occur with each total solar eclipse, although some of them you will still be able to spot even if you are in other states in which you will only see a partial solar eclipse. Also during totality it gets weird, suddenly becoming twilight dark and there is a distinct temperature drop. Get a piece of cardboard, punch a pin hole in it, and then angle the cardboard to project the sun's light on another piece of cardboard or another flat object. This ever-changing region grows and shrinks based on solar conditions، and researchers will use the eclipse as a ready-made experiment. The first 100 attendees will receive a free pair of eclipse viewing glasses, limit one pair per family.

To protect your eyes when viewing the sun or an eclipse, NASA and the American Astronomical Society (AAS) advise you to use solar eclipse glasses or other solar filters from recommended manufacturers. It's a long duration event so spread your looks out. The Eclipse begins in Lima at 1:01:48pm with the mid eclipse happening at 2:27:42pm.

Steve Roark is the area forester in Tazewell for the Tennessee Department of Agriculture, Forestry Division. NOVA will also collaborate with several local public television stations along the path of totality, who will provide footage shot in their own back yards, illustrating the excitement the eclipse generates across the nation.

"One solar eclipse activity I hope to see less of is the sometimes-ridiculous effort to hunt down stars and planets during totality".

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