Fall night sky offers wondrous celestial sights, including Halloween blue moon

While only viewable in South America, December also presents what is expected to be a stunning total solar eclipse.

We’ve created a guide on what to look for and when.

October

October begins and ends with a full moon, the first appearing atypically tiny because of its distance from earth in orbit. That moon, called the Hunter’s Moon or Harvest Moon, kicks off the month.

Halloween will feature a full moon, too, also relatively diminutive in appearance because the moon is close to apogee, or the farthest point in its orbit. The Oct. 31 full moon is also special because it’s a “blue moon,” or the second full moon in a month.

Blue moons only happen every two to three years on average, because the lunar cycle lasts 29.5 days. That means only one full moon can usually occur within a given month. Occasionally, two squeeze in on either side

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