Viewing conditions should be ideal in NY as the first full moon of fall - known as the hunter's moon - rises in the night sky.

October's supermoon, known as the "Hunter's Moon," will be the biggest and brightest full moon of the year. Why it matters: The third of this year's four consecutive supermoons arrives during an active month of skywatching between rare northern lights sightings and the once-in-a-lifetime comet.

Stargazers in the U.S. will be dazzled this week as the closest—and largest—supermoon of the year graces the skies.