A total solar eclipse, which is when the Moon completely covers the Sun, will occur across 14 states in the US on August 21, 2017, along a 112 km-wide swath of the country. More than 350 million people in the US potentially could directly view the solar eclipse, and NASA wants everyone who will witness this celestial phenomenon to do so safely manner. Special-purpose solar filters, such as eclipse glasses or a handheld solar viewer, you can safely look directly at the Sun.
It’s not wise to stare directly at the Sun with your naked eyes or risk damaging your vision, and that safety advice holds true for a partially eclipsed Sun.
Ordinary sunglasses should not be used as a replacement for eclipse viewing glasses or handheld solar viewers
“While NASA isn’t trying to be the eclipse safety glasses ‘police,’ it’s our d1uty to inform the public about safe ways to view what should be a spectacular sky show for the entire continental US,” said Alex Young, Associate Director at NASA’s Goddard Space Flight Centre in Greenbelt, Maryland.
the space agency NASA has coordinated with medical and science professionals to provide additional safety information to the public. GREAT NASA, KEEP IT UP!