For the first time in some 30 years and likely the last for another 30 years, a "supermoon" event will overlap with a lunar eclipse.

According to Space.com, the rare skywatching event will take place late at night on Sept. 27 and will be most viewable in North and South America, Europe, Africa, western Asia, and the eastern Pacific Ocean region.

Space.com is offering continuous coverage of the Supermoon Eclipse.

The Supermoon Eclipse is just what it seems; the moon will make a close approach to the Earth and will appear abnormally large, which is a sight to behold on its own, but the moon will also pass into the Earth's shadow at this time.

"Because the orbit of the moon is not a perfect circle, the moon is sometimes closer to the Earth than at other times during its orbit," Noah Petro, deputy project scientist for the Lunar Reconnaissance Orbiter at NASA's Goddard Space Flight Center in Greenbelt, Md., said in a press release. "When the moon is farthest away it's known as apogee, and when it's closest it's known as perigee. On Sept. 27, we're going to have a perigee full moon-the closest full moon of the year."

The last Supermoon Eclipse occurred in 1982 and scientists project the next will come in 2033.

"There's no physical difference in the moon," Petro said. "It just appears slightly bigger in the sky. It's not dramatic, but it does look larger."