Monday's supermoon will be extra super — it will be the closest the moon comes to us in almost 69 years. And it won't happen again for another 18 years.
NASA says closest approach will occur at 6:21 a.m. EST when the moon comes within 221,523 miles (356,508 kilometers). That's from the center of the Earth to the center of the moon. Full moon will occur at 8:52 a.m. EST.
In 2034, the moon will come even closer, within 221,485 miles. That, too, will be a supermoon.