APOD: 2026 October 10 – Lunar Farside

TL;DR

Age 18–24?Offer from Amazon

Prime made for students and young adults

• Fast, free delivery for dorm and study essentials
• Prime Video and Amazon Music included
• Member-only deals

Try Prime for Young Adults →Free trial for eligible 18–24 year olds

As an affiliate, we earn on qualifying purchases.Hide

NASA’s Astronomy Picture of the Day for October 10, 2026, features a mosaic centered on the Moon’s farside, made from Lunar Reconnaissance Orbiter images. The image shows terrain that differs markedly from the nearside; a thicker farside crust is a likely explanation for the relative scarcity of smooth, dark lunar maria.

NASA’s Astronomy Picture of the Day for October 10, 2026, features a detailed mosaic centered on the Moon’s farside, assembled from images taken by the Lunar Reconnaissance Orbiter. The view highlights the farside’s rough, heavily cratered appearance compared with the broad, smooth dark plains familiar from Earth, and NASA’s accompanying explanation points to a likely geological reason: a thicker farside crust may have made it harder for molten material to reach the surface and form maria.

The featured image was made from observations by the Lunar Reconnaissance Orbiter’s wide-angle camera. According to NASA’s Astronomy Picture of the Day explanation, it is part of a global mosaic built from more than 15,000 images acquired between November 2009 and February 2011. The highest-resolution version depicts surface features at a scale of 100 meters per pixel.

NASA describes the farside as rugged and battered, in contrast with the nearside’s smoother, dark expanses known as lunar maria. The maria are broad plains formed by ancient volcanic material that spread across parts of the Moon’s surface. The featured picture is centered on the farside; it is not a photograph taken from Earth, where that hemisphere is generally out of view.

The APOD entry is an image feature rather than an announcement of a new spacecraft finding. Its publication brings attention to an existing orbital image dataset and offers an explanation for the visible difference between the Moon’s two hemispheres. NASA credits the image to NASA, Goddard Space Flight Center, Arizona State University and the Lunar Reconnaissance Orbiter.

A Different Face of the Moon

The contrast in the image makes a major feature of lunar geology visible at a glance: the Moon’s two hemispheres do not have the same distribution of smooth volcanic plains. The nearside maria are among the most recognizable lunar features from Earth, while the farside’s more rugged surface offers a different record of the Moon’s history. Seeing both patterns together helps readers understand that the familiar face is not representative of the entire lunar surface.

The mosaic also illustrates the value of sustained orbital mapping. More than 15,000 images gathered over a period of roughly 15 months were combined to show a broad region in consistent detail. That kind of coverage provides a map-like view useful for comparing terrain, rather than a single isolated photograph. The APOD presentation makes this data accessible while retaining the image’s scientific context.

NASA presents the thicker-crust explanation as likely, not as a new proof established by this image. The picture is evidence of the surface contrast; the explanation concerns the geological processes that may have produced it. Keeping that distinction clear matters: a striking image can show what is different, while explaining why requires broader scientific evidence.

How the Farside Was Mapped

The Moon rotates on its axis at the same rate that it orbits Earth, a relationship called synchronous rotation. As a result, the same hemisphere generally faces Earth, which is why the near side became familiar to observers long before spacecraft could image the opposite side. The farside is not permanently dark; it receives sunlight, but its surface cannot ordinarily be viewed directly from Earth.

The Lunar Reconnaissance Orbiter has observed the Moon from orbit, allowing cameras to record terrain unavailable to ground-based observers. NASA says the mosaic featured on October 10 draws on wide-angle-camera images collected from November 2009 through February 2011. The APOD explanation describes the resulting product as part of a global mosaic, with a highest-resolution version showing features at 100 meters per pixel.

NASA’s explanation links the hemispheric contrast to differences in the Moon’s crust. If the farside crust is thicker, molten material from the interior would have had more difficulty reaching the surface and spreading into the wide, smooth plains seen on the nearside. The source presents this as a likely explanation; it does not provide a new measurement of crust thickness in the APOD entry.

What the Image Cannot Establish

The APOD entry does not report a new finding or give a specific measurement comparing the thickness of the two hemispheres’ crusts. It identifies thicker farside crust as a likely explanation for the relative lack of maria, but does not describe the supporting evidence or quantify how much thicker the crust may be.

The source also does not claim that the farside lacks volcanic plains altogether. It contrasts the farside’s rough surface with the nearside’s more extensive smooth dark maria. The extent of the visible difference, and how the proposed crustal explanation relates to other factors in lunar history, are not explored in this image caption.

No new mission results, instrument performance updates or future observations are announced alongside the picture. The precise image view and any additional technical processing details beyond the camera, image count, acquisition dates and stated pixel scale are not specified in the supplied APOD text.

The Mission Behind the Mosaic

The APOD page’s immediate next item is listed as “Sunday’s Childe”. The October 10 feature does not announce a follow-up release or a new Lunar Reconnaissance Orbiter milestone. Readers seeking further detail on the mosaic can consult NASA’s image article and its credited institutions for the source material and image information.

More broadly, orbital observations remain the means by which the farside can be studied in comparable detail to the hemisphere visible from Earth. Any new conclusions about crust thickness or the history of lunar volcanism would require evidence beyond the descriptive caption accompanying this image. NASA’s APOD entry does not state when such results may be published.

Key Questions

What does NASA’s October 10, 2026 APOD show?

It shows a mosaic centered on the Moon’s farside, made from Lunar Reconnaissance Orbiter wide-angle-camera images.

Why does the Moon’s farside look different from its nearside?

NASA says a thicker crust on the farside is a likely reason molten material had more difficulty reaching the surface to form broad, smooth lunar maria. The APOD caption presents this as an explanation, not a new finding demonstrated by the image alone.

When were the mosaic images collected?

The mosaic draws on more than 15,000 images acquired between November 2009 and February 2011, according to NASA’s explanation.

Can people on Earth see the lunar farside?

Not ordinarily. The Moon’s synchronous rotation keeps much the same hemisphere facing Earth, so spacecraft observations are needed to image the farside directly.

Is this APOD reporting a new lunar discovery?

No new discovery is announced in the supplied entry. It is an Astronomy Picture of the Day feature presenting an existing Lunar Reconnaissance Orbiter mosaic and scientific context about the hemispheres’ different appearances.

Source: primary