After multiple attempts to image the Cydonia region from April 2004 until July 2006 were frustrated by altitude and atmospheric dust and haze, the High Resolution Stereo Camera (HRSC) on board Mars Express finally obtained, on 22 July, a series of images that show the famous ‘face’ on Mars in unprecedented detail.
The data were gathered during orbit 3253 over the Cydonia region, with a ground resolution of approximately 13.7 metres per pixel. Cydonia lies at approximately 40.75° North and 350.54° East.
“These images of the Cydonia region on Mars are truly spectacular,” said Dr Agustin Chicarro, ESA Mars Express Project Scientist. “They not only provide a completely fresh and detailed view of an area famous to fans of space myths worldwide, but also provide an impressive close-up over an area of great interest for planetary geologists, and show once more the high capability of the Mars Express camera.”
Cydonia is located in the Arabia Terra region on Mars and belongs to the transition zone between the southern highlands and the northern plains of Mars. This transition is characterized by wide, debris-filled valleys and isolated remnant mounds of various shapes and sizes.
‘Human face’ first seen in 1976
One of these visible remnant massifs became famous as the ‘Face on Mars’ in an image taken on 25 July 1976 by the American Viking 1 Orbiter.
A few days later, on 31 July 1976, a NASA press release said the formation “resembles a human head.” However, NASA scientists had already correctly interpreted the image as an optical illusion caused by the illumination angle of the Sun, the formation’s surface morphology and the resulting shadows, giving the impression of eyes, nose and mouth.
Nonetheless, the ‘Face on Mars’ was the subject of widespread speculation on the possible origins and purpose of artificial structures on the Red Planet, with the face being the most talked-about formation.
The array of nearby structures has been interpreted by some space enthusiasts as artificial landscapes, such as potential pyramids and even a disintegrated city. The idea that the planet might have once been home to intelligent beings has since inspired the imagination of many Mars fans, and has been expressed in numerous, more-or-less serious, newspaper articles as well as in science-fiction literature and on many Web pages.
On 22 July, the HRSC finally met success during orbit 3253, and a wide area in Cydonia was imaged at the best possible resolution and in 3D.
In fact, in addition to the well-known ‘face’ and ‘pyramids,’ a naturally skull-shaped structure also appears in some of the Mars Express images. ESA European Space Agency – Mars Express Orbiter