Rare 'Blue Moon' to light up the sky Halloween night

FILE – A Super Blue Blood Moon rises above Portsmouth on January 31, 2018 in Portsmouth, United Kingdom. (Photo by Matt Cardy/Getty Images)

NASHVILLE, Tenn. (WZTV) - It will be quite the evening for spooky star-gazers looking up Halloween night as a rare "Blue Moon" is set to light up the sky.

October has two full moons, which means one of them is a Blue Moon. This happens every two and a half years on average, NASA says.

Look to the skies on Oct. 1 to see the first full moon of the month, the "Harvest Moon."

Then on Oct. 31, Halloween night will bring ghouls, goblins and the rare "Blue Moon." But will it really be blue? NASA says probably not.

And get this: Our next Blue Moon on Halloween won't be until 2039!