For the first time in scientific history, researchers have managed to determine the age of the awe-inspiring star dunes, also known as pyramid dunes.
These majestic formations, towering over 100 meters high, grace the landscape of the Erg Chebbi sand sea in southeast Morocco.
Utilizing advanced luminescence dating techniques, scientists have unveiled that these monumental dunes took shape over 13,000 years ago, providing a glimpse into the ancient processes sculpting our planet's terrain, according to NASA.
Calculating the Age of Star Dunes with ASTER
The breakthrough in age calculation came through meticulous analysis facilitated by cutting-edge technology. Employing the ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) instrument, researchers were able to capture high-resolution images of Earth's surface, including the enigmatic star dunes nestled in the Moroccan desert.
With its array of 14 spectral bands spanning from visible to thermal infrared wavelengths, ASTER delivers unprecedented detail, crucial for mapping and monitoring changes in Earth's dynamic landscape.
ASTER is a vital component of NASA's Terra mission, launched in 1999, and stands as a testament to international collaboration in scientific endeavors.
Developed by Japan's Ministry of Economy, Trade, and Industry, it has provided invaluable data for various scientific disciplines.
The joint efforts of U.S. and Japanese scientists have ensured the validation and calibration of ASTER's data products, paving the way for multifaceted applications across diverse domains.
According to NASA, the versatility of ASTER extends far beyond mere observation, offering critical insights into a myriad of natural phenomena.
From monitoring glacial movements and volcanic activities to assessing crop health and thermal pollution, ASTER's capabilities transcend boundaries, aiding researchers in unraveling the complexities of Earth's dynamic systems.
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The Majesty of Sand Dunes
Star dunes, also known as pyramid dunes, are the tallest and most imposing sand dunes on Earth. Characterized by their towering height, intricate structure, and distinct pyramid-like shape, star dunes are magnificent features in sandy desert landscapes.
These dunes typically exhibit multiple arms or ridges radiating from a central point, resembling the arms of a star, hence the name.
Various factors, including wind direction, sand supply, and sediment availability, influence the formation of star dunes. As prevailing winds shift direction over time, sand particles accumulate around obstacles such as vegetation or topographical features, developing multi-ridged dunes with steep slopes.
Over millennia, these dunes can grow to heights exceeding 100 meters, creating dramatic vistas across desert regions.
