Iran Press/ Asia: A lunar eclipse happens when Earth comes in line with the sun and moon. While the moon is within Earth's shadow, the moon appears to turn a shade of red. Particulate matter in the sky also plays a role in just how deep the red color gets.

The light shines from a total lunar eclipse over Santa Monica Beach in Santa Monica, Calif., Wednesday, May 26, 2021. The first total lunar eclipse in more than two years is coinciding with a supermoon for quite a cosmic show. 

From beginning to end, the lunar eclipse will last more than five hours. It gets started around 9:30 pm Sunday night, but the peak of the show starts about two hours later. You won't notice the red shading overspread the moon until about 11:30 pm. The peak of the lunar eclipse ends just before 1:00 am.

The cloud cover forecast includes partly to mostly cloudy skies. Since the peak of the eclipse lasts about an hour and a half, there's a good chance we should get at least a glimpse of the reddish hue of the moon.