Unusual Objects Inside Guyot Crater On The Lunar Surface

A Preliminary Evaluation

By Johannes Fiebag, Ph.D. (Geologist)

Image of Guyot Crater

There are two unusual objects of unknown origin in the Guyot crater on the lunar farside: a giant triangular shaped object and a smaller cylindrical shaped object. Until now, no hypothesis supporting a natural origin can explain their existence. It cannot be excluded that we really have detected some ETAs (extraterrestrial artifacts) on the Moon.

There has been speculation about past and even current extraterrestrial activity on the Moon for many years. The so-called “moon blinks” and “lunar transient phenomena” may originate from natural volcanic processes or meteorite impacts. However, there appears to be a connection between the frequency of these “blinks” and earthly space missions, namely the Apollo missions of 1968-1972.

Beyond that, various authors continue to identify monuments or other indications of extraterrestrial activity on images from the lunar probes or manned missions to the Moon. Most of these structures seem to be natural, others are only products of wishful thinking. However, among them are also some examples [2,3] which should be considered more closely during future missions (e.g. the Lunar Prospector).

Recently (on an Apollo 16 image of the Guyot crater), I discovered two mysterious objects which cannot be explained simply as a “trick of light and shadow,” natural hills or photographic artifacts. The image in question can be found on the official NASA collection web site of the Apollo missions and can be viewed at: [Update: NASA removed the image from this page. Click here instead. ]

The image covers a part of the Guyot crater. The crater has a diameter of roughly 100 kilometers (about 60 miles) and is located on the lunar farside (at 12ƒn / 117ƒe). On this image, a fraction of the rim, a fraction of the crater floor and the lunar highlands beyond Guyot can be seen.

In approximately the center of the image - right in the middle of the crater rim - a prominent and surprisingly clear triangular structure attracts attention. The object is erected high above the surface and throws a shadow to the right side (I do not know if this is east, since there is no orientation given). This excludes a simple “trick of light and shadow” as a mere photographic artifact. The object is real. Since the whole crater is 60 miles in diameter you can roughly evaluate the size of the structure. It must be erected some hundreds, if not nearly a thousand meters above the surface. Additionally, it seems to be flat in shape (unlike a classic pyramid) and very smooth.

Possible Origins

Could this object be a giant natural boulder and part of the Guyot crater rim?

This is unlikely because all boulders of this dimension would have been fractured, shattered and destroyed during the Guyot impact. Nothing like this could have “survived.”

Is it part of the small crater behind it?

This is unlikely because this crater is too small to produce such giant impact boulders.

Could it be ejecta of another impact crater far away?

This is unlikely because according to its dimensions it would have caused a further (secondary) crater as we know them from many examples on the Moon. Also, it would have been totally destroyed during the impact.

Is it a volcanic dome-like knoll, already consolidated in the Moon’s crust? Was it later pushed up from underground to the surface? (We have some examples of this from terrestrial volcanology.)

This is also unlikely for the following reasons:

(1) We have never found anything similar to this on the Moon until now;

(2) There are no additional indications of volcanic activity around the Guyot crater area and it would be very unlikely that such activity would appear inside the crater rim. It is more likely to have occurred on the crater floor (like in the Maria basins or big craters, e.g. Tsiolkowsky, also on the lunar farside); and,

(3) No volcanic activity would produce a flat triangular shaped object like this.

Other natural explanations do not exist - as far as I know. Admittedly, you can neither exclude an “exotic” natural origin, nor that a natural explanation will be found one day. Right now, however, I cannot imagine it.

So - what can this object be? I do not insist that we are looking at a real ETA (extraterrestrial artifact) here, but I cannot dismiss this possibility. Additionally, only miles away, to the south-east (if north is on top of the image) another unusual object can be observed. This object seems to be cylindrical and is conspicuous because of its extraordinary white color and the “sharpness” of its shape. The probability that two unusual but natural objects are positioned so close together seems to be very low.

What we need to do is analyze this image and consider all of the possibilities I have suggested. If this shows there is a chance that ETAs exist and we can exclude all “natural hypotheses,” then it is very likely that we have the first real evidence for an extraterrestrial artifact on the Moon. Everybody can imagine what this will mean for humanity.


Arkhipov, A. (1994): “ ‘Invasion effect’ on the Moon.” Selenology, 13/1, 9-11.

Arkhipov, A. (1997): “Search for ruin-like patterns on the Moon.” Selenology, 15/4, 18-20.

Carlotto, M. (1997): “On-Going investigation of lunar anomalies.”

© 1997 By Johannes Fiebag, Ph.D.

This article is published with the expressed written permission of Johannes Fiebag for publication on

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Guyot Crater NASA Image

Guyot Crater on Lunar Surface

Image of Guyot Crater

Did you know that way back in 1989 an abductee-experiencer was given a fly-over of a base on the Moon? After the craft landed they were told, “You are on the dark side of the moon…” Here’s a snippet of the account that was published in 1993:

“There is an omnipresent city on the horizon. All of the buildings are either domed shaped or triangular shaped…The domes are illuminated from within. They glow with a soft white color and the sides of these domes are silver-gray...”

Another account was published five years later in 1998 in Penetration. The extraordinarily gifted Ingo Swann described remote viewing an alien base on the moon back in 1975. One of the structures appeared to be nearly 40 stories high which is similiar to what the previous witness saw, as illustrated below.


Lunar Base Dark Side of Moon

“You mean – am I to believe this stuff – is not OURS! Not made on Earth?”

“Axel raised his eyebrows, trying to grin. ‘Quite a surprise, isn’t it.’ I had a sense he was trying NOT to be emotional….I closed my eyes as waves of goosebumps cascaded through my body. I couldn’t control them, so I broke into tears.” – Ingo Swann


A lot has transpired since Dr. Fiebag first published this article. Today we have many images and videos [update at site] of the surface of the Moon and Mars showing anomalous structures. Here’s an account from Karl Wolfe about the Moon Base evidence he saw while working at an NSA facility. And even stranger perhaps is a holographic appearing phenomenon over the lunar surface called a lunar wave.


Johannes Fiebag

Johannes Fiebag was born in 1956, and was Germany’s leading abduction research specialist until his untimely death in 1999 from a virulent form of stomach cancer. He was only 43 years old. He published many books about alien contact in ancient and modern times, and four books specifically about the abduction phenomenon in Germany, Austria, and Switzerland. His last two books about the UFO phenomenon are titled Sternentore [Stargates] and Das UFO-Symdrom [The UFO Syndrome]. Both books were published in 1996.

Johannes Fiebag studied Geology, Paleontology, Physics and Geophysics at the University of Wurzburg, earning a Ph.D. in 1988, with his thesis in a special branch of Planetology. He wrote many scientific papers in his field, and also worked as a freelance science writer. He also co-authored several books with his brother Peter Fiebag. His latest book, written with Torsten Sasse, is titled Mars - Planet de Lebens.


Other Articles by Johannes Fiebag:

Das CE-IV Lexikon (A Rare Document Published by Multiple Authors)

The Genesis Project II: The Extraterrestrial Presence in Ancient Times and Today

Unusual Objects on The Lunar Surface in Guyot Crater

Alien Abductions in Germany, Austria and Switzerland

The Guadalupe Event


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