Apod

[burgundia]

Beautiful photos....

[Ross H]

Superb photos, thank you

[Luminari]

http://www.google.com/mars/

I just viewed the region of the mars grotto on google mars.. you can't find it with that, the zoom isn't great enough. I'm going to try NASA Worldwind..

[Luminari]

Holy smoke theres not one hole... but seven in that part of Tharsis Montes.

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.

[P4BL0]