Here's how to watch the twin supermoon and total lunar eclipse event online.
Next month a supermoon and a total lunar eclipse will coincide in what will certainly be a treat for stargazers.
The longest lunar eclipse to occur in the 21st century will clock in at 103 minutes.
Dry your eyes and grab your binoculars. There's still plenty to see.
It's the first such occasion since 1982, and the next supermoon eclipse won't happen until 2033.
NASA will broadcast starting at 8 p.m. EDT with views from Griffith Observatory.
The moon will appear large, bright and red, but it doesn't spell doom.