A phenomenon will occur Aug. 21 when the sun disappears behind the moon, during daylight into twilight during the partial solar eclipse.
In the Jacksonville area, this will begin around 1 p.m. through 4 p.m., with the optimal time being at 2:45 at nearly 90 percent of coverage.
A total eclipse will take place from Oregon to South Carolina for nearly three minutes.
Unless wearing sunglasses with the International Organization of Standardizations (ISO) certified eye protection, it is extremely unsafe to look directly at the sun.
Within a few seconds of looking at the sun, rods and cones in the retina can be damaged. This includes using normal sunglasses or viewing through a camera or cell phone.
For a list of vendors approved by NASA with approved glasses, visit their webpage at https://eclipse2017.nasa.gov.
On this site you can safely watch this event.