Dry Valleys, Antarctica

Författare/Upphovsman:

NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team

Kreditera:

NASA Image of the Day

Kort länk:

https://sewiki.info/b/602d5

Källa:

Wikimedia Commons

Upplösning:

3900 x 4331 Pixel (2019902 Bytes)

Beskrivning:

The McMurdo Dry Valleys are a row of valleys west of McMurdo Sound, Antarctica, so named because of their extremely low humidity and lack of snow and ice cover. Photosynthetic bacteria have been found living in the relatively moist interior of rocks. Scientists consider the Dry Valleys to be the closest of any terrestrial environment to Mars. With its 14 spectral bands from the visible to the thermal infra-red wavelength region and its high spatial resolution of about 50 to 300 feet, ASTER images Earth to map and monitor the changing surface of our planet. ASTER is one of five Earth-observing instruments launched Dec. 18, 1999, on NASA's Terra satellite. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint U.S./Japan science team is responsible for validation and calibration of the instrument and the data products. The broad spectral coverage and high spectral resolution of ASTER provides scientists with critical information for surface mapping and monitoring of dynamic conditions and temporal change.

Licens:

Public domain