Cydonia (/sɪˈdoʊniə/, /saɪˈdoʊniə/) is a region on the planet Mars that has attracted both scientific and popular interest. The name originally referred to the albedo feature (distinctively coloured area) that was visible from Earthbound telescopes. The area borders plains of Acidalia Planitia and the Arabia Terra highlands. The area includes the regions: "Cydonia Mensae", an area of flat-topped mesa-like features, "Cydonia Colles", a region of small hills or knobs, and "Cydonia Labyrinthus", a complex of intersecting valleys. As with other albedo features on Mars, the name Cydonia was drawn from classical antiquity, in this case from Cydonia or Kydonia (/sɪˈdoʊniə/; Ancient Greek: Κυδωνία; Latin: Cydonia), a historic polis (city state) on the island of Crete.
Cydonia contains the "Face on Mars", located about halfway between Arandas Crater and Bamberg Crater.
Location
Cydonia lies in the planet's northern hemisphere in a transitional zone between the heavily cratered regions to the south and relatively smooth plains to the north. Some planetologists believe that the northern plains may once have been ocean beds, and that Cydonia may once have been a coastal zone. It is in the Mare Acidalium quadrangle.
Picture of the Cydonia region taken in 2006 by The European Space Agency's satellite Mars Express.
"Face on Mars"
Cropped
version of the original batch-processed image (#035A72) of the "Face on
Mars". The black dots that give the image a speckled appearance are
data errors (salt-and-pepper noise).
1976 Viking Orbiter image (left, image #070A13) compared with the 2001 Mars Global Surveyor image (right). The "Face" is 1.5 km across in size.
Cydonia was first imaged in detail by the Viking 1 and Viking 2 orbiters. Eighteen images of the Cydonia region were taken by the orbiters, of which seven have resolutions better than 250 m/pixel
(820 ft/pixel). The other eleven images have resolutions that are worse
than 550 m/pixel (1800 ft/pixel) and are of limited use for studying
surface features. Of the seven good images, the lighting and time at
which two pairs of images were taken are so close as to reduce the
number to five distinct images. The Mission to Mars: Viking Orbiter Images of Mars
CD-ROM set image numbers for these are: 035A72 (VO-1010), 070A13
(VO-1011), 561A25 (VO-1021), 673B54 & 673B56 (VO-1063), and 753A33
& 753A34 (VO-1028).
In one of the images taken by Viking 1 on July 25, 1976, a two-kilometre-long (1.2 mi) Cydonian mesa, situated at 40.75° north latitude and 9.46° west longitude, had the appearance of a humanoid face. When the image was originally acquired, Viking chief scientist Gerry Soffen dismissed the "Face on Mars" in image 035A72 as a "trick of light and shadow".
However, a second image, 070A13, also shows the "face", and was
acquired 35 Viking orbits later at a different sun-angle from the 035A72
image. This latter discovery was made independently by Vincent DiPietro
and Gregory Molenaar, two computer engineers at NASA's Goddard Space Flight Center.
DiPietro and Molenaar discovered the two misfiled images, Viking frames
035A72 and 070A13, while searching through NASA archives. The resolution of these images was of about 50 m/pixel.
Later imagery
More than 20 years after the Viking 1
images were taken, a succession of spacecraft visited Mars and made new
observations of the Cydonia region. These spacecraft have included
NASA's Mars Global Surveyor (1997–2006) and Mars Reconnaissance Orbiter (2006–), and the European Space Agency's Mars Express probe (2003–).
In contrast to the relatively low resolution of the Viking images of
Cydonia, these new platforms afford much improved resolution. For
instance, the Mars Express images are at a resolution of 14 m/pixel (46 ft/pixel) or better. By combining data from the High Resolution Stereo Camera (HRSC) on the Mars Express probe and the Mars Orbiter Camera (MOC) on board NASA's Mars Global Surveyor it has been possible to create a three-dimensional representation of the "Face on Mars".
Mars Reconnaissance Orbiter image by its HiRISE camera of the "Face on Mars". Viking Orbiter image inset in bottom right corner.
One of many formations in Cydonia, this one is sometimes called the "D & M pyramid".
Since it was originally first imaged, the face has been accepted by scientists as an optical illusion, an example of the psychological phenomenon of pareidolia. After analysis of the higher resolution Mars Global Surveyor data NASA
stated that "a detailed analysis of multiple images of this feature
reveals a natural looking Martian hill whose illusory face-like
appearance depends on the viewing angle and angle of illumination". Similar optical illusions can be found in the geology of Earth; examples include the Old Man of the Mountain, the Romanian Sphinx, Giewont, the Pedra da Gávea, the Old Man of Hoy, Stac Levenish, Sleeping Ute, and the Badlands Guardian.
Speculation
The Cydonia facial pareidolia inspired individuals and organizations interested in extraterrestrial intelligence and visitations to Earth, and the images were published in this context in 1977. Some commentators, most notably Richard C. Hoagland, believe the "Face on Mars" to be evidence of a long-lost Martian civilization along with other features they believe are present, such as apparent pyramids, which they argue are part of a ruined city.
While accepting the "face" as a subject for scientific study, astronomer Carl Sagan criticized much of the speculation concerning it in the chapter "The Man in the Moon and the Face on Mars" in his 1995 book The Demon-Haunted World. The shape-from-shading work by Dr. Mark J. Carlotto was used by Sagan in a chapter of his famous Cosmos series.
In 1998 a news article about the "Space Face" quoted a scientist
talking about deciphering "intelligent design" in nature. A cutting of
this was used by Charles Thaxton as an overhead visual for a lecture at Princeton, in his first public use of the term "intelligent design" as a substitute for creation science.
The "face" is also a common topic among skeptics groups, who use it as an example of credulity. They point out that there are other faces on Mars but these do not elicit the same level of study. One example is the Galle Crater, which takes the form of a smiley, while others resemble Kermit the Frog or other celebrities. On this latter similarity, Discover magazine's "Skeptical Eye" column ridiculed Hoagland's claims, asking if he believed the aliens were fans of Sesame Street.
In popular culture
As a result of the speculation concerning their artificial origins, Cydonia and the "Face on Mars" appear frequently in popular culture, including feature films, television series, video games, comic books, and even popular music. For example: films featuring the structures include Mission to Mars (2000); TV series include The X-Files ("Space", 1993), Invader Zim ("Battle of the Planets", 2002), Futurama ("Where the Buggalo Roam", 2002), Phineas and Ferb ("Unfair Science Fair", 2009); video games include Zak McKracken (1988), Final Fantasy IV (1991), Ultima Martian Dreams (1991), X-COM: UFO Defense (1993), SWIV 3D (1996), Red Faction: Guerrilla (2009), Kerbal Space Program (2015), Call of Duty: Infinite Warfare (2016); comic books include Martian Manhunter (#1, 1998); and music includes Cydonia from the album Implant by Eat Static (1994), Telemetry of a Fallen Angel by The Crüxshadows (1995), Cydonia by Crimson Glory (1999), "Knights of Cydonia" by Muse (2006) and Hunting & Gathering (Cydonia) by Sunn O))) (2009).
In 1958, almost two decades prior to the first images of the Face from the Viking probes, the comic book artist Jack Kirby wrote a story entitled "The Face on Mars" for Harvey Comics (Race for the Moon
Number 2, September 1958), in which a large face (oriented vertically
rather than horizontally) served as a monument to an extinct humanoid
race from Mars.
