APOD: 2026 October 23 – Andromeda In Southern Spring

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NASA’s Astronomy Picture of the Day for October 23, 2026, features a composite image of the Andromeda Galaxy rising above hills near Mullion, New South Wales. The image uses multiple exposures to show detail that is not visible to the unaided eye, while the galaxy remains low above the northern horizon from that location.

NASA’s Astronomy Picture of the Day for October 23, 2026, features the Andromeda Galaxy rising above rolling hills near Mullion, New South Wales, in a composite made from photographs taken on October 10 and 11. The image shows how the galaxy appears from a southern spring location where, NASA says, it stays only a few degrees above the northern horizon.

The scene was photographed by Lucy Yunxi Hu, with multiple exposures combined to show the galaxy’s structure as it appeared above the landscape. NASA describes the result as a deep astro-image composite: digitally tracked and stacked frames reveal more detail in the sky, while a separate foreground exposure supplies the hills. The combination brings out a larger view of Andromeda than a single unaided-eye observation would show.

Also known as M31, Andromeda is one of the brightest objects in the Messier catalog. NASA’s description says it is visible without optical aid as a small, faint, fuzzy patch, rather than as a clearly resolved spiral. In the featured image, the galaxy’s apparent width spans nearly six full moons, a comparison describing its size across the sky in this scene.

The NASA APOD entry is an astronomy photograph accompanied by an explanation written by a professional astronomer. Its authors and editors are listed as Jerry Bonnell, Cecilia Chirenti, Robert Nemiroff and Keighley Rockcliffe. The service is associated with NASA’s Goddard Space Flight Center, NASA Science Activation and Michigan Technological University.

A Low Horizon View of M31

The photograph shows how Andromeda’s altitude varies with the observer’s position. From Mullion, the galaxy remains close to the northern horizon, where terrain and atmospheric conditions can affect its visibility. NASA says it reaches its highest point around midnight during southern hemisphere spring.

The composite combines multiple exposures to show detail not visible to the naked eye. Andromeda appears as a dim patch to unaided observers, while the separate sky and landscape exposures make its faint spiral structure and surrounding extent more visible.

The APOD presents a dated view of the night sky and the observing perspective from Mullion. It does not announce a new discovery about Andromeda; the entry features a specific photograph selected for NASA’s daily astronomy feature.

Why Andromeda Sits So Low

Andromeda is a large spiral galaxy beyond the Milky Way and is commonly identified by its catalog designation M31. Its apparent position in the sky means that observers in the Southern Hemisphere look toward the north to see it. NASA’s APOD explanation gives the local circumstances for this image: from Mullion, New South Wales, the galaxy never rises more than a few degrees above the horizon.

The time of year matters to the view described in the photograph. During southern hemisphere spring, Andromeda is highest in the sky around midnight, according to NASA. The October 10–11 exposures were made in that seasonal window. The entry says the galaxy spans nearly six full moons in the composite, while noting that the naked-eye view is much smaller and fainter in detail.

NASA publishes a different featured image or photograph each day through APOD, accompanied by a short explanation. This October 23 entry credits Hu for the image and points to a separate APOD for the following day, titled “Pixels in Space.”

Limits of the Published Details

The APOD entry identifies the photographer, location and capture dates, and explains that tracked and stacked sky frames were combined with a foreground shot. It does not provide the number of exposures, their individual durations, camera or telescope specifications, or the image-processing settings. Those details cannot be inferred from the published description.

The statement that Andromeda spans nearly six full moons is an apparent-size comparison for the image’s sky view, not a measurement of the galaxy’s physical diameter. The entry also does not give weather or sky-transparency conditions at Mullion. It describes the galaxy’s visibility from that location but does not promise that it will be equally clear to every observer or on every night.

The Next APOD Feature

NASA’s listing says the next Astronomy Picture of the Day, scheduled for October 24, 2026, is titled “Pixels in Space.” The October 23 entry does not announce a related observing campaign, new scientific result or follow-up study. Readers seeking more information about the image can refer to the NASA APOD page, which credits Lucy Yunxi Hu and provides the accompanying explanation.

NASA’s description says Andromeda is highest around midnight during southern spring from Mullion. It does not provide a viewing forecast or detailed local observing instructions; visibility will depend on the observer’s position, horizon and sky conditions.

Key Questions

What does NASA’s October 23, 2026, APOD show?

It shows the Andromeda Galaxy rising above hills near Mullion, New South Wales, in a composite image made from photographs taken on October 10 and 11.

Can Andromeda be seen with the naked eye?

NASA says it is visible without optical aid as a small, faint, fuzzy patch. The spiral detail in the featured composite was brought out using multiple digitally tracked and stacked exposures.

Why is Andromeda low in this photograph?

From Mullion in New South Wales, NASA says the galaxy does not rise more than a few degrees above the horizon. During southern spring it reaches its highest point around midnight.

How was the image made?

NASA’s explanation says digitally tracked and stacked sky frames were combined with a separate foreground photograph. The entry does not specify exposure counts, equipment or processing settings.

Who took the photograph?

The image is credited to Lucy Yunxi Hu. NASA lists Jerry Bonnell, Cecilia Chirenti, Robert Nemiroff and Keighley Rockcliffe as authors and editors of the APOD entry.

Source: primary