Beginning about 2 a.m., we will experience a total eclipse of the moon. That means the entire moon -- not just part of it -- will be in the Earth's shadow.
Dr. Stephen Schiff, president of the Astronomical Society of the Palm Beaches, suggests going outside between 2 or 2:30 until about 3:30 or 4.
"You'll see that the moon has darkened -- it'll probably be a reddish brown," he says.
He says the early morning is "not a convenient time for everyone" but "we haven't seen a nice total eclipse for 28 months," so this is a rare chance to catch one.
It would be great if the weather is clear, he says, and "binoculars are nice," but go out regardless -- because "clouds move, and the moon is a bright thing" that is visible to the naked eye.
Here is a more detailed hour-by-hour description of what to expect throughout the eclipse, as well as some cool graphics and video from space.com.
The next expected lunar eclipses should take place on October 8, then April 4 and September 28, 2015.
Also: Space X is scheduled to launch a Dragon spacecraft at 4:58 p.m. today, bringing supplies from Cape Canaveral to the International Space Station. The craft is unmanned. It contains a lettuce farm and microbes that were collected by NFL and NBA cheerleaders.
The Science Museum of the Palm Beaches has no events planned at its planetarium for eclipse viewing tonight/Tuesday morning.