A Harvest Moon Reaches Peak Illumination Tonight: When to Look Up

What is a Harvest Moon?

The Harvest Moon is the full moon that occurs closest to the autumnal equinox, which is the day when the sun crosses the celestial equator and day and night are of equal length. This year, the autumnal equinox occurs on September 22, and the Harvest Moon will reach peak illumination on the night of September 20-21.

When to Look Up

In North America, the Harvest Moon will rise at sunset on September 20th and reach peak illumination at 12:54 AM EDT on September 21st. This means that the best time to view the Harvest Moon is after sunset on September 20th or before sunrise on September 21st.

Why is the Harvest Moon So Bright?

The Harvest Moon appears brighter than other full moons because it is lower in the sky, closer to the horizon. When the moon is near the horizon, its light has to travel through more of the Earth's atmosphere, which scatters the blue light waves and leaves the longer, redder wavelengths. This gives the moon a warm, orange hue.

Harvest Moon Folklore

The Harvest Moon has been celebrated for centuries by cultures around the world. In Europe, the Harvest Moon was traditionally a time of feasting and celebration, as it marked the end of the harvest season. In North America, Native American tribes used the Harvest Moon to mark the beginning of the hunting season.

How to Enjoy the Harvest Moon

There are many ways to enjoy the Harvest Moon. You can simply go outside and look up at the sky, or you can find a local stargazing event. You can also take pictures of the moon, or use it as a backdrop for a picnic or bonfire.