Image:Mars caves from NASA orbiters.jpg

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Description

Seven very dark holes on the north slope of a Martian volcano have been proposed as possible cave skylights, based on day-night temperature patterns suggesting they are openings to subsurface spaces. These six excerpts of images taken in visible-wavelength light by the Thermal Emission Imaging System camera on NASA's Mars Odyssey orbiter show the seven openings. Solar illumination comes from the left in each frame. The volcano is Arsia Mons, at 9 degrees south latitude, 239 degrees east longitude.

The features have been given informal names to aid comparative discussion. They range in diameter from about 100 meters (328 feet) to about 225 meters (738 feet). The candidate cave skylights are (A) "Dena," (B) "Chloe," (C) "Wendy," (D) "Annie," (E) "Abby" (left) and "Nikki," and (F) "Jeanne." Arrows signify north and the direction of illumination.
Source

http://www.nasa.gov/mission_pages/odyssey/images/cave2.html
Date

Uploaded September 24, 2007
Author

NASA JPL USGS ASU NAU
Permission
(Reusing this image)
Public domain
 This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy).

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current02:22, 24 September 20071,890×1,265 (269 KB)DragonFire1024 ({{Information |Description=Seven very dark holes on the north slope of a Martian volcano have been proposed as possible cave skylights, based on day-night temperature patterns suggesting they are openings to subsurface spaces. These six excerpts of images)
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Orientation Normal
Horizontal resolution 300 dpi
Vertical resolution 300 dpi
Software used Adobe Photoshop CS2 Windows
File change date and time 08:38, 19 September 2007
Color space 65535