POSTADO 17-03-2011 ÀS 12:47pm |
184 |
REBLOGUE!
This is the shirt for my university’s undergraduate astronomy club. Design credit goes to awesome astronomer and astro club member midwesternsky.
POSTADO 17-03-2011 ÀS 12:46pm |
250 |
REBLOGUE!
Chasma Boreale, Mars
Chasma Boreale, a long, flat-floored valley, cuts deep into Mars’ north polar icecap. Its walls rise about 4,600 feet, or 1,400 meters, above the floor. Where the edge of the ice cap has retreated, sheets of sand are emerging that accumulated during earlier ice-free climatic cycles. Winds blowing off the ice have pushed loose sand into dunes and driven them down-canyon in a westward direction.
This scene combines images taken during the period from December 2002 to February 2005 by the Thermal Emission Imaging System instrument on NASA’s Mars Odyssey was part of a special series of images marking the orbiter as the longest-working Mars spacecraft in history.
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