Total solar eclipse 2017: Everything to know about the upcoming celestial event

It will be the first total solar eclipse in the contiguous U.S. since 1979.

ByMorgan Winsor and Gina Sunseri
August 21, 2017, 8:22 AM

— -- People across the country are counting down the hours until the total solar eclipse will arc across the continental United States for the first time in decades.

Here's everything you need to know about this rare and striking astronomical event that you won't want to miss.

What is it?

Related Topics

ABC News Live

ABC News Live

24/7 coverage of breaking news and live events