Supermoon Eclipse

The science of the very rare lunar event that will appear in the sky Sunday night.

This weekend will bring the “supermoon eclipse,” and according to NASA, you’re not going to want to miss it. The moon’s closest approach to the Earth can make it appear up to 14 percent larger in diameter, and when you add an eclipse, you’ve got something truly special.

Since 1900, we’ve only had five supermoon eclipses, in 1910, 1928, 1946, 1964, and 1982. If you miss this one, you’ll have to wait another 18 years. NASA suggests you start looking for the event on Sunday around 8 p.m. Eastern. Fortunately, the eclipse will last more than an hour, peaking around 10:47 p.m.