Astronomy Picture of the Day · September 2025

APOD, September 2025

30 entries from September 2025: 28 images and 2 videos. 19 carry a copyright notice from the credited creator.

A dark spherical body is shown that has many light craters. Please see the explanation for more detailed information. September 1, 2025

Callisto: Dirty Battered Iceball

Image Credit: NASA , JPL-Caltech , Voyager 2 ; Processing & License : Kevin M. Gill ;A starfield is shown with bright and dark nebulae of different shapes and colors. Please see the explanation for more detailed information. September 2, 2025 · Copyrighted

The Horsehead and Flame Nebulas

Image Credit & Copyright: Daniel SternA nebula is shown that appears roughly the shape of Africa. The complex radio image shows rings and jets. Please see the explanation for more detailed information. September 3, 2025

Cir X-1: Jets in the Africa Nebula

Image Credit: J. English ( U. Manitoba ) & K. Gasealahwe ( U. Cape Town ), SARAO , MeerKAT , ThunderKAT ; Science: K. Gasealahwe, K. Savard ( U. Oxford ) et al. ; Text: J. English & K. SavardNGC 4565: Galaxy on Edge September 4, 2025 · Copyrighted

NGC 4565: Galaxy on Edge

Image Credit & Copyright: José Rodrigues ( IA , OFXB )47 Tucanae: Globular Star Cluster September 5, 2025 · Copyrighted

47 Tucanae: Globular Star Cluster

Image Credit & Copyright: Carlos TaylorSardinia Sunset September 6, 2025 · Copyrighted

Sardinia Sunset

Image Credit & Copyright: Lorenzo BusilacchiAn illustration of planet Earth is shown where the Earth is tan and has no water shown on its surface. In the foreground are several small blue spheres showing how much water is known to reside on our planet. Please see the explanation for September 7, 2025

All the Water on Planet Earth

Illustration Credit: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution ; Data source: Igor ShiklomanovA starfield surrounds a nebula with a vertical brown bar across its center. Gas and dust fan out from the bar making the nebula appear like a colorful butterfly. Please see the explanation for more detailed information. September 8, 2025

IRAS 04302: Butterfly Disk Planet Formation

Image Credit: NASA , ESA , CSA , Webb ; Processing: M. Villenave et al.An image of Earth from space shows an unusual multi-colored jet in the middle of the frame. Please see the explanation for more detailed information. September 9, 2025

Up from the Earth: Gigantic Jet Lightning

Image Credit: NASA , Expedition 73 , Nicole AyersA starfield surrounds a large red nebula. The nebula has many flowing waves and folds. Please see the explanation for more detailed information. September 10, 2025 · Copyrighted

The Great Lacerta Nebula

Image Credit & Copyright: Ian Moehring & Kevin RoylanceThe Umbra of Earth September 11, 2025 · Copyrighted

The Umbra of Earth

Image Credit & Copyright: Wang Letian ( Eyes at Night )Lunar Eclipse in Two Hemispheres September 12, 2025 · Copyrighted

Lunar Eclipse in Two Hemispheres

Image Credit & Copyright: North – Zhouyue Zhu , South – Lucy Yunxi HuStar Trails over One-Mile Radio Telescope September 13, 2025 · Copyrighted

Star Trails over One-Mile Radio Telescope

Image Credit & Copyright: Joao Yordanov SerralheiroPlanets of the Solar System: Tilts and Spins September 14, 2025 · Video

Planets of the Solar System: Tilts and Spins

Video Credit: NASA , Animation: James O’Donoghue ( U. Reading )Video September 15, 2025 · Video

Earth During a Powerful Solar Storm

Video Credit: NASA ‘s SVS , SWRC , CCMC , SWMF ; T. Bridgman et al.A starfield is seen above a horizon and an orange sunset. In the starfield, near the horizon, is a comet with a green head and long tail. Please see the explanation for more detailed information. September 16, 2025 · Copyrighted

New Comet SWAN25B over Mexico

Image Credit & Copyright: Daniel KoronaA starfield surrounds a several large nebulas that appear mostly red but also white and blue. Dark dust and blue filaments also populate the frame. Please see the explanation for more detailed information. September 17, 2025 · Copyrighted

Nebulas and Clusters in Sagittarius

Image Credit & Copyright: J. De Winter , C. Humbert , C. Robert & V. Sabet ; Text: Ogetay Kayali ( MTU )Comet C/2025 R2 (SWAN) September 18, 2025 · Copyrighted

Comet C/2025 R2 (SWAN)

Image Credit & Copyright: Team Ciel AustralThe NGC 6914 Complex September 19, 2025 · Copyrighted

The NGC 6914 Complex

Image Credit & Copyright: Tommy LeaseGibbous vs Crescent September 20, 2025 · Copyrighted

Gibbous vs Crescent

Image Credit & Copyright: Luca BartekA city skyline is shown behind some hills and a river. The path of the Sun is shown for several times during a year. Please see the explanation for more detailed information. September 21, 2025

Equinox Sunset

Image Credit: Luca VanzellaThe planet Saturn is pictured 6 times in a horizonal column, labelled by years with 2020 at the top and 2025 at the bottom. As the years progress, Saturn's ring appear less prominent. Please see the explanation for more detailed information September 22, 2025 · Copyrighted

Equinox at Saturn

Image Credit & Copyright: Imran SultanStars dot the frame that has a blue background. Covering the lower part of the image, and the far right, are brown and tan nebular structures. Please see the explanation for more detailed information. September 23, 2025

NGC 6357: Cathedral to Massive Stars

Image Credit: NASA , ESA , CSA , STScI , JWST ; Processing: Alyssa Pagan ( STScI ); Rollover: NASA , ESA , HST , & J. M. Apellániz ( IAA , Spain); Acknowledgement: D. De Martin ( ESA/Hubble )Artwork depicts a colorful version of two black holes nearing collision from between the black holes. Swirling gas is depicted with wavey lined depicting gravitational waves ringing and an artificial grid depicting spacetime shown distortin September 24, 2025

GW250114: Rotating Black Holes Collide

Illustration Credit: Aurore Simonnet ( SSU / EdEon ), LVK, URI; LIGO CollaborationSaturn Opposite the Sun September 25, 2025 · Copyrighted

Saturn Opposite the Sun

Image Credit & Copyright: Jin WangA SWAN, an ATLAS, and Mars September 26, 2025 · Copyrighted

A SWAN, an ATLAS, and Mars

Image Credit & Copyright: Adam BlockA Rocket in the Sun September 27, 2025 · Copyrighted

A Rocket in the Sun

Image Credit & Copyright: Pascal FouquetPart of a large rock on Mars is shown being mostly orange. On the rock are several irregular light-colored areas surrounded by a dark border. The spots are only millimeters across but might be a remnant biosignature of ancient Martian life. September 28, 2025

Leopard Spots on Martian Rocks

Image Credit: NASA , JPL-Caltech , MSSS , Perseverance RoverA starfield is shown that has two short streaks running diagonally. At closer inspection, they are two comets both with white-green heads and white tails. Please see the explanation for more detailed information. September 29, 2025 · Copyrighted

Two Camera Comets in One Sky

Image Credit & Copyright: Luc Perrot ( TWAN )A starfield is shown that has a bright comet. The comet shows a green head on the lower left and an ion tail with significant structure extending out to the upper right. Please see the explanation for more detailed information. September 30, 2025 · Copyrighted

Comet Lemmon Brightens

Image Credit & Copyright: Victor Sabet & Julien De Winter

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