Home
Weather New York
WeatherRadar
RainRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
Career
    Home / Editor's Pick /

    September astro outlook: Fourth supermoon and Neptune appears

03:00 PM
September 2, 2023

September astro outlook
Fourth supermoon and Neptune appears

star-gazing

September is not the most active month for stargazers, but it does deliver the autumn equinox, ushering in the new season.

The month begins with a new moon on September 15 offering dark skies perfect for those wanting to see fainter objects in the night sky.

Those faint objects will include Neptune in opposition on September 19, though only for those with powerful telescopes.

The furthest planet from the sun will be illuminated by the star on this day, offering the best chance to spot the gas giant.

A few days later, we find Mercury at its greatest western elongation. On September 22, the closest planet to the sun will be visible just before dawn. Look towards the eastern horizon before sunrise.

A day later, and the autumnal equinox heralds the beginning of astronomical autumn. This year, the equinox takes place on September 23, at 2:49 a.m. EDT (September 22, 11:49 p.m. PDT).

At the equinox the sun will shine directly on the equator, giving us an almost equal number of hours of day and night. In the Southern Hemisphere, this is the spring equinox.

Finally, the month is rounded out by the year's fourth, and final, supermoon. Rising on the evening of September 29, this full moon is dubbed the harvest, or corn, moon.

The closest full moon to the equinox is always referred to as the harvest moon. This year it becomes a supermoon as it arrives in parallel with the moon's perigee, the closest point to Earth in its orbit.

If you head out to capture the supermoon, have a telescope powerful enough to spot Neptune, or use the darkness of the new moon for a spot of stargazing... we would love to see what you capture.

Tap the image icon in the app or use our dedicated uploader.

Tips: Astrophotography with your phoneread more
Weather & Radar USA editorial team
More on the topic
Super Typhoon Near the Philippines. Gusts up to 155. . . Tuesday, June 23, 2026
Tuesday, June 23, 2026

Gusts up to 155

Super Typhoon Near the Philippines
Longest day of the year is here. Summer solstice. . . Sunday, June 21, 2026
Sunday, June 21, 2026

Summer solstice

Longest day of the year is here
The only Blue Moon of the year rises. May astronomy outlook. . . Saturday, May 2, 2026
Saturday, May 2, 2026

May astronomy outlook

The only Blue Moon of the year rises
All weather news
This might also interest you
The dangers of hail. What to know. . . Saturday, June 27, 2026
Saturday, June 27, 2026

What to know

The dangers of hail
Understanding the feels like temperature. Advanced heat measurement. . . Friday, July 3, 2026
feels like temperature
Friday, July 3, 2026

Advanced heat measurement

Understanding the feels like temperature
Be ready for tropical activity. Tips & tools. . . Saturday, June 27, 2026
Track hurricanes with the WeatherRadar
Saturday, June 27, 2026

Tips & tools

Be ready for tropical activity
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy policy Legal info Accessibility statement

Services

Uploader

Socials

instagramfacebookthreadslinkList