Watch this space for LIVE coverage of the total solar eclipse on August 21, 2017! Starting at 15:30 UTC (see corresponding US times: https://www.timeanddate.com/worldcloc…), NASA will bring you live footage from multiple locations and real-time updates about the current location of the eclipse shadow and the progress of the eclipse in the US and worldwide.
A total eclipse occurs when the dark silhouette of the Moon completely obscures the intensely bright light of the Sun, allowing the much fainter solar corona to be visible. During any one eclipse, totality occurs at best only in a narrow track on the surface of Earth.
Since looking directly at the Sun can lead to permanent eye damage or blindness, special eye protection or indirect viewing techniques are used when viewing a solar eclipse. It is technically safe to view only the total phase of a total solar eclipse with the unaided eye and without protection; however, this is a dangerous practice, as most people are not trained to recognize the phases of an eclipse, which can span over two hours while the total phase can only last a maximum of 7.5 minutes for any one location. People referred to as eclipse chasers or umbraphiles will travel to remote locations to observe or witness predicted central solar eclipses.