Frosty Gullies on the Northern Plains of Mars
Seasonal frost commonly forms at middle and high latitudes on Mars, much like winter snow on Earth. However, on Mars most frost is carbon dioxide (dry ice) rather than water ice. This frost appears to cause surface activity, including flows in gullies.
This image, acquired on April 11, 2015, by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter, shows frost in gully alcoves in a crater on the Northern plains. The frost highlights details of the alcoves, since it forms in different amounts depending on slopes and shadows as well as the type of material making up the ground. Rugged rock outcrops appear dark and shadowed, while frost highlights the upper alcove and the steepest route down the slope.
Most changes associated with gullies are observed in the Southern hemisphere. However, some are seen in the Northern hemisphere, where steep slopes are less common. HiRISE is monitoring these gullies to look for changes and to understand the behavior of the frost.
The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Mars Reconnaissance Orbiter Project and Mars Science Laboratory Project for NASA's Science Mission Directorate, Washington.
Image Credit: NASA/JPL/University of Arizona
Caption: Colin Dundas
Caption: Colin Dundas
Last Updated: July 30, 2015
Editor: Sarah Loff
el dispensador dice:
alguna vez hubo gentes,
les decían humanos,
alguien se los llevó,
a la Tierra de al lado...
aquí dejaron polvo,
suelos contaminados,
se consumieron las aguas,
hielos que se van quebrando...
pasados envenenados,
presentes desolados,
futuros negados,
aquí estuvieron los humanos...
son muchos los vestigios,
que a su paso dejaron,
ellos tenían huertos,
para mentir sus atrasos...
se comían entre ellos,
sapiencias de sacrificados,
mucho genio perdido,
no quedó ni un solo sabio...
no creas lo que te cuentan,
está todo armado,
la tragedia griega,
es un mero hecho... consumado...
y se repite la historia,
con estos seres humanos,
hablan de la consciencia,
pero hasta los ángeles los han ahuyentado.
JULIO 30, 2015.-
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