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Utah’s Green River doubling back on itself—a feature known as Bowknot Bend—from the International Space Station on January 22, 2014. — NASA

Utah’s Green River doubling back on itself—a feature known as Bowknot Bend—from the International Space Station on January 22, 2014.

The Operational Land Imager (OLI) on Landsat 8 acquired this image of the Arkansas River and the Holla Bend Wildlife Refuge on Aug. 4, 2014.

An artificial island at the southern end of Bahrain Island on January 23, 2011.

The Enhanced Thematic Mapper on Landsat 7 acquired this image of Akimiski Island in James Bay on August 9, 2000.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image of a phytoplankton bloom off the coast of New Zealand on Oct. 25, 2009.

The Operational Land Imager (OLI) on Landsat 8 acquired this false-color image of valleys and snow-covered mountain ranges in southeastern Tibet on August 4, 2014.

This image of Pinaki Island was captured on the International Space Station in April 2001.

The Operational Land Imager on Landsat 8 acquired this image of rivers running through colorful ridges in southwestern Kyrgyzstan on August 30, 2014.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this image of the Andaman Islands on Feb. 10, 2007.

The Operational Land Imager on Landsat 8 captured this image of the Trunk Reef near Townsville, Australia on July 17, 2015.

The Operational Land Imager (OLI) on Landsat 8 acquired this image of glaciers at the Sirmilik National Park Pond Inlet in Mittimatalik, Canada on August 3, 2015.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite captured this image of snow across the northeastern United States on Oct. 30, 2008.

The Operational Land Imager (OLI) on Landsat 8 captured this image of glaciers in the Tian Shan mountains in northeastern Kyrgyzstan on August 14, 2015.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite captured this image of ship tracks over the Pacific on March 4, 2009. Ship emissions contain small particles that cause the clouds to form.

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on the Terra satellite captured this image of Tenoumer meteorite crater in Mauritania on Jan. 24, 2008.

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) sensor on the Terra satellite captured this false-color image of the Mackenzie River Delta in Canada on August 4, 2005.

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite acquired this image of Lonar Crater in India on Nov. 29, 2004.

The Operational Land Imager (OLI) on Landsat 8 captured this image of Lago Menendez in Argentina on Jan. 20, 2015.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite acquired this image of clouds swirling over the Atlantic Ocean on April 29, 2009.

The Operational Land Imager (OLI) on Landsat 8 captured this image of development along two roads in the United Arab Emirates on March 9, 2015.

The Ikonos satellite captured this image of Gooseneck State Park in Utah on May 9, 2004.

The Operational Land Imager (OLI) on Landsat 8 acquired this image of ash on the snow around Shiveluch—one of the largest and most active volcanoes on Russia’s Kamchatka Peninsula on March 23, 2015.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite captured this image of dust blowing over the Red Sea on Jan. 13, 2009.

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite captured this false-color image of the northwest corner of Leidy Glacier in Greenland on August 7, 2012.

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra satellite captured this false-color image of the Ugab River in Namibia on Dec. 25, 2000.

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image of wildfire smoke over Canada on July 11, 2012.

A: Utah’s Green River doubling back on itself—a feature known as Bowknot Bend—photographed by an astronaut from the Inte

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See All 26 Letters of the Alphabet Spelled Out in Stunning Space Photography

Jan 05, 2016

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