APOD: 2026 October 23 – Andromeda In Southern Spring

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NASA’s Astronomy Picture of the Day for Oct. 23, 2026, features a composite image of the Andromeda Galaxy rising over rolling hills near Mullion, New South Wales. The image combines tracked exposures of the galaxy with a separate foreground shot to show a faint naked-eye object in much greater detail.

NASA’s Astronomy Picture of the Day on Oct. 23, 2026, features the Andromeda Galaxy rising above rolling hills near Mullion, New South Wales, in an image assembled from multiple exposures. The scene shows how the galaxy appears from Australia during southern spring, when it reaches its highest point in the sky around midnight but remains close to the northern horizon.

The photograph was made by Lucy Yunxi Hu from a location in Mullion, in the Australian state of New South Wales. NASA’s accompanying explanation says the view looks north and that Andromeda never climbs more than a few degrees above the horizon from there. The exposures used for the scene were taken on the night of October 10–11.

According to NASA, the final image combines digitally tracked and stacked frames of the galaxy with a separate foreground photograph. Tracking and stacking let faint astronomical detail build up across exposures, while the foreground shot keeps the hills in the composition. The resulting composite reveals more of Andromeda’s extent than a single unaided-eye view would show.

Andromeda is also known as M31 and is one of the brighter objects in the Messier catalog. NASA describes the unaided-eye view as a small, faint, fuzzy patch. In the image’s sky, the nearby large spiral galaxy spans nearly six full-moon widths, according to the APOD explanation. The daily feature is produced through NASA’s Astronomy Picture of the Day service, which pairs an image with an explanation written by a professional astronomer.

Andromeda From the Southern Hemisphere

The image offers a view of a familiar galaxy from a location where its position makes observation more challenging. From Mullion, Andromeda stays low in the north, so its light is viewed through a thicker stretch of Earth’s atmosphere than it would be when high overhead. The APOD notes its midnight high point in southern spring, helping readers understand why the photographer chose this season and time for the composition.

It also makes clear how much an astronomical photograph can differ from what the eye sees. M31 appears to the unaided eye as a faint, fuzzy patch; tracked, stacked exposures bring out its spiral structure and broader span. The composite presents that detail alongside a recognizable landscape, connecting a distant galaxy to an actual night sky and horizon.

For readers, the picture is both a record of a particular observing session and a demonstration of image-making methods. NASA’s description identifies the use of multiple exposures and a separate foreground image, rather than presenting the scene as a single unaltered exposure. That distinction matters when interpreting what the photograph shows: it combines real views made at the site into one image to convey detail not readily visible to the naked eye.

A Seasonal View of M31

NASA’s APOD feature is a daily astronomy-image service. Each entry presents a photograph or other image with an explanation, and the Oct. 23 entry focuses on M31, the Andromeda Galaxy. The source identifies it as the closest large spiral galaxy and notes its standing as one of the brightest objects in the Messier catalog.

The timing is specific to the southern hemisphere. NASA says that during southern spring, Andromeda is highest around midnight. Its low path across the sky from this Australian location explains why the scene shows it climbing just above the hills rather than high overhead. The source does not give a more precise observing time or report weather conditions.

The published picture’s credit is Lucy Yunxi Hu, with copyright credited to Hu. NASA lists Jerry Bonnell, Cecilia Chirenti, Robert Nemiroff and Keighley Rockcliffe as authors and editors, and identifies the service as supported by the Astrophysics Science Division at NASA’s Goddard Space Flight Center, NASA Science Activation and Michigan Technological University.

Details Behind the Composite Image

NASA’s explanation identifies the general image-making process but does not provide the number of exposures, their individual exposure times, the equipment used or the processing settings. It also does not state how many frames were stacked or give technical details about aligning the galaxy frames with the foreground photograph.

The APOD account does not specify the exact time the exposures were made, the sky conditions or whether the nearly six-Moon comparison refers to the full visible extent in the composite or a measured angular size. The published wording presents the comparison as a description of the image; it does not provide a separate measurement or methodology.

The source describes the composite and its components but does not claim that the final image is a single exposure. No additional observing data or independent verification of image-processing details are included in the supplied report. These omissions do not alter the stated location, date range or broad method, but they limit how precisely readers can reconstruct the photography.

The Next APOD Feature

NASA’s listing points readers to the next Astronomy Picture of the Day, titled “Pixels in Space.” The supplied report does not give its image, subject or publication details beyond identifying it as the following day’s picture.

For the Oct. 23 feature, the report’s immediate purpose is to share Hu’s completed composite and explain its setting and method. NASA has not announced further updates to this image or additional observing information in the source material. Readers seeking those details would need a later NASA post or information from the photographer.

Key Questions

What does NASA’s Oct. 23, 2026, APOD show?

It shows the Andromeda Galaxy rising above rolling hills near Mullion, New South Wales, during southern spring. NASA says the picture combines multiple galaxy exposures with a separate foreground shot.

When and where were the exposures taken?

Photographer Lucy Yunxi Hu made the image from Mullion, New South Wales. NASA says the exposures were taken on the night of October 10–11; the source does not provide an exact time.

Can Andromeda be seen without a telescope?

NASA says M31 is visible to the unaided eye as a small, faint, fuzzy patch. The image’s stacked exposures reveal far more detail than the naked-eye view.

Why is Andromeda low in this Australian image?

From Mullion, the galaxy appears in the northern sky and never rises more than a few degrees above the horizon. NASA says it reaches its highest point around midnight during southern spring.

Source: primary