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The Great American Eclipse by Dr. Winkel

The Great American Eclipse

On August 21, a solar eclipse will be visible in the United States, Mexico, and Canada.

We in the Tri-Cities will see a partial eclipse with 96% of the sun obscured by the moon.  Even this will be a sight to behold.  The maximum eclipse in Tri-Cities will be at 10:24 am.  The event begins at 9:10 am. The moon will complete its travel across the sun at 11:44 am. The proper solar filters or eclipse glasses will be important for protecting our eyes.   Eclipse glasses must meet the standard for ISO 12312-2:2015. These glasses are “CE” Certified and meet the transmission requirements of scale 12-16 of EN 169/1992 for absolutely safe direct solar viewing. Don’t risk damage to your eyes.

See Dr. Hedman’s blog describing what happens without proper protection.

The unique aspect of this eclipse is the cross-country band of totality from Salem, Oregon to Charleston, South Carolina. A total solar eclipse completely blocks the sun turning day into night.  The last solar eclipse in our country was in 1979, and totality was only observed by a portion of the eastern seaboard.

The total eclipse lasts a mere 2 minutes and 10 seconds in our region.  The nearest town that is within the band of totality is Dale, OR (2-1/4 hours away). It is south of Pendleton, OR. The longest totality will be 2 minutes 41 seconds near Carbondale, Illinois. The lack of sun may cause animals to believe it is night fall.  For example, birds may think it is time to roost, or cows may head for their night sheds.

Check out these links with a wealth of information.

GreatAmericanEclipse.com

eclipse2017.nasa.gov 

https://www.timeanddate.com/eclipse/in/usa/pasco

jpl.nasa.gov/edu/learn/project/how-to-make-a-pinhole-camera/ – NASA scientists’ plans for building indirect viewing devices.

Enjoy this momentous event safely.