NASA throwing an eclipse party in D.C. [Video]

WASHINGTON (NEXSTAR) – The U.S. is just days away from a total solar eclipse. Millions of Americans will see the moon block the sun, or at least part of the sun. 

There’s an eclipse party planned for your nation’s capital, hosted by NASA and the Smithsonian’s National Air and Space Museum. 

Mariel O’Brien is an astronomy educator at the museum. She’s been studying the skies for more than two decades.

“It’s a really nice situation where a large swath of the U.S. is going to be able to view a total eclipse, and all of the U.S. will be able to see a partial eclipse,” O’Brien said. 

At the “Solar Eclipse Festival” on the National Mall Monday, visitors will be able to view Washington D.C.,’s partial eclipse at about 3:20 p.m.ET, when 87% of the sun will be covered. 

“It’s actually the result of what we call a cosmic coincidence,” …