The truth behind the Halloween 2020 blue moon, according to an Astronomer

October of 2020 is an exicting month for the moon, with a full moon on the first day of the month, and the last day of the month, making the full moon on October 31st 2020, a blue moon.

“In this case, the moon’s cycle is under 30 days, because of that you can have an event that you get more than one full moon in a given month,” Jackie Faherty, an astronomer at the American Museum of Natural History in New York City, tells Yahoo Life. “The second full moon of any given month, we refer to as a ‘blue moon’.”

This full moon will not actually be blue, however Faherty says that there are occasions where the moon can appear in hues of orange or blue, due to an effect caused by the Earth’s atmosphere. “It changes color as it passes through the most amount of atmosphere, it can create these gorgeous colors for you,” she says. “So it will look orange, it can even look blueish.”

According to Faherty, however, a blue moon occurs about every two to three years, which she doesn't consider a very rare occurance. She says a more accurate rare phenomena to reference would be a Milky Way supernova, when a star explodes in our galaxy, which happens approximately every 50 years. A “very very rare” occurrence according to Faherty.

None the less, Faherty says any full moon can be spectacular to watch, and she recommends trying to watch the moonrise as well if you can. “Everybody gets all romantic about the sunrise and the sunset but a moonrise and a moonset can be very dramatic and exciting,” Faherty tells Yahoo Lifestyle. “They are spectacular.”