• At 9:30 p.m. ET on Sunday, the moon will start to creep into the part of Earth's shadow known as the penumbra. Not much darkening will be visible yet, according to NASA.
• By 10:33 p.m. ET, you should see Earth's shadow start to move across the surface of the moon, growing larger and larger and larger until it completely covers it up.
• 11:41 p.m. ET will mark the totality of the eclipse, as the moon is fully shaded by Earth. That's where the "blood" comes in. There's no violence involved. Instead, the term comes from a reddening of the moon as light leaks around the edge of Earth.

The moon will stay bathed in our colorful shadow for more than an hour before orbiting back out into the sunlight.

As NASA explains, Earth casts a red shadow because of how our atmosphere scatters light. During our days, sunlight coming in from up high is scattered. Short blue lightwaves are bounced around, leaving us with blue skies. But when the sun comes in at an angle — at sunset, sunrise or from the perspective of the moon on the other side of Earth — the sun's reddish light becomes dominant. That light can also change based on dust, pollutants or other particles in Earth's atmosphere.

So what about the "super" part of Sunday's show in the sky? The moon's orbit around Earth is not perfectly round, so as it circles Earth it is sometimes closer and sometimes farther away, by a distance of about 26,000 miles. That means that when the moon is at its closest point to Earth — known as the perigee — it can appear up to 17 percent larger than it does at the farthest point in its orbit. Sunday's eclipse will almost coincide with that perigee, meaning that the moon won't just be redder than usual, it will also look a tiny bit wider.

If you're a visual learner, NASA has you covered:

It won't take any special equipment to see the total eclipse — no telescopes or dark glasses required. The main impediment to experiencing the relatively rare phenomenon? Weather.

Midwesterners and Southerners should get a good look at the big, red moon. But National Weather Service cloud-cover forecasts show that the Northeast and much of the West might have their views obscured.

If you can't catch the eclipse through your window, you can always watch it livestreamed on a screen. Or you can just wait for the Instagram posts.

As NPR's Rebecca Hersher has reported, the moon will get its shadowy revenge in a few years: "There will be solar eclipses visible from parts of the contiguous U.S. on Oct. 14, 2023, and April 8, 2024. The one in 2024 will be a total solar eclipse visible from Texas to Maine."

Correction: January 17, 2019 12:00 am — A previous version of this story referred to Earth's orbit of the moon. In fact, the moon orbits Earth.

Copyright NPR 2019.