Face on Mars from Wikipedia

Cydonia (region of Mars)

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Coordinates: 40.74°N 9.46°W

Small part of the Cydonia region, taken by the Viking 1 orbiter and released by NASA/JPL on July 25, 1976

Cydonia (/sɨˈdoʊniə/, /saɪˈdoʊniə/) is a region on the planet Mars that has attracted both scientific^[1] and popular interest.^[2][3] 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.^[4] 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.^[5][6] As with other albedo features on Mars, the name Cydonia was drawn from classical antiquity, in this case from Kydonia, a historic polis (or "city-state") on the island of Crete.^[7] Cydonia contains the "Face on Mars" feature—located about half-way between Arandas Crater and Bamberg Crater.^[4]

Contents

• 1 Location
• 2 "Face on Mars"
  • 2.1 Later imagery
  • 2.2 Speculation
  • 2.3 In popular culture
• 3 See also
• 4 References
• 5 Further reading
• 6 External links

Location

External images

Cydonia region by Mars Express © ESA/DLR/FU Berlin (G. Neukum) Credit & Copyright — Scale: 13.7 m/pixel

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^[8] and that Cydonia may once have been a coastal zone.^[9]

"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.^[10]

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 lower 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).^[11][12]
In one of the images taken by Viking 1 on July 25, 1976, a 2 km (1.2 miles) long Cydonian mesa, situated at 40.75° north latitude and 9.46° west longitude,^[13] 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^[14] as a "trick of light and shadow".^[15][16] 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.^[17]

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-),^[18] and the European Space Agency's Mars Express probe (2003-).^[19] 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".^[20]

 

Mars Global Surveyor image (MOC camera) of the same feature.

Since it was originally first imaged, the "face" has been near-universally accepted as an optical illusion, an example of the psychological phenomenon of pareidolia.^[21] 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".^[22] Similar optical illusions can be found in the geology of Earth;^[23] examples include the Old Man of the Mountain, the Pedra da Gávea, the Old Man of Hoy, Stac Levenish and the Badlands Guardian.^[24]

Speculation

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".^[25][26]

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.^[27][28] 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.^[29]
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 book The Demon-Haunted World.^[30][31] The "face" is also a common topic among skeptics groups, who use it as an example of credulity.^[32] They point out that there are other faces on Mars, often much clearer, but their images do not elicit the same level of study. An example is the Galle Crater, which can show a rendition of a smiley, or a profile of Kermit the Frog, or other celebrities.^[33] Discover magazine's "Skeptical Eye" column ridiculed Hoagland's claims, asking if he believed the aliens were fans of Sesame Street.^[17][34]

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), X-COM: UFO Defense (1993); comic books include Martian Manhunter (#1, 1998); and music includes Telemetry of a Fallen Angel by The Crüxshadows (1995), "Knights of Cydonia" by Muse (2006), "Hunting and 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 served as a monument to an extinct humanoid race from Mars.^[35][36]

See also

• Geography of Mars
• Libya Montes, home to another "face"