Blue moon

A full moon on Halloween occurs approximately every 19 years, with the feat last happening in 2001.

As it flies past, the space rock will be travelling at a speed of around 36,000 miles per hour.

The full moon that occurs closest to the fall equinox is traditionally dubbed the "Harvest Moon."

This is the first Full Corn Moon for three years.

On October 31, Uranus will be at its closest point to Earth.

A rare seasonal "blue moon" will take place on May 18. The next one won't be until August 2021.

There are two definitions of "blue moon." Neither involve the moon actually turning blue.

It's also the best time of the year to see Mercury.

The U.S. won't see another super blue blood trio until 2037.

The lunar eclipse can help scientists learn how to spot "biosignatures" on distant planets.

The moon will glow big, bright—and red.

Three separate lunar events will coincide next week.

The second supermoon of the month will glow a spectacular red.

The combination of lunar eclipse, supermoon and blue moon is incredibly rare.

This moon has piled up a stunning array of adjectives—here's what they all mean.

"The elements of this case are odd, at best."

It turns out that tonight's lunar event has nothing to do with color.