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The Sun and the Stars - 63 - BESSE - EN - CHANDESSE - Church of Saint - Andre, crossover of the choir, Romanesque sculpture 12th century: THE SUN AND THE STOILE
The Sun and the Stars - 63 - BESSE - EN - CHANDESSE - Church of Saint - Andre, crossover of the choir, Romanesque sculpture 12th century: THE SUN AND THE STOILE

PIX4629290: The Sun and the Stars - 63 - BESSE - EN - CHANDESSE - Church of Saint - Andre, crossover of the choir, Romanesque sculpture 12th century: THE SUN AND THE STOILE / Bridgeman Images

View of the road station from the inside of a building in Brasilia (Brazil). Photography 15/04/07
View of the road station from the inside of a building in Brasilia (Brazil). Photography 15/04/07

TEC4629307: View of the road station from the inside of a building in Brasilia (Brazil). Photography 15/04/07 / Bridgeman Images

Le Soleil vu en coupe - Sun cutaway - Cutaway of the sun
Le Soleil vu en coupe - Sun cutaway - Cutaway of the sun

PIX4629367: Le Soleil vu en coupe - Sun cutaway - Cutaway of the sun / Bridgeman Images

General view of the monumental axis with in the background the cathedral of Brasilia (Brazil). Photography 15/04/07.
General view of the monumental axis with in the background the cathedral of Brasilia (Brazil). Photography 15/04/07.

TEC4629380: General view of the monumental axis with in the background the cathedral of Brasilia (Brazil). Photography 15/04/07. / Bridgeman Images

Kepler's Law - Illustration - The segment that connects the planet to the Sun sweeps equal areas in equal times. In other words, the speed of a planet becomes greater when the planet approaches the Sun. It is maximum in the vicinity of the shortest radius (perihelie), and minimal in the vicinity of the largest radius (aphelie). Second Kepler's law, the line joining a planet and the Sun sweeps out equal areas during equal intervals of time. The planet moves faster near the Sun, so the same area is swept out in a given time as at larger distances, where the planet moves more slowl
Kepler's Law - Illustration - The segment that connects the planet to the Sun sweeps equal areas in equal times. In other words, the speed of a planet becomes greater when the planet approaches the Sun. It is maximum in the vicinity of the shortest radius (perihelie), and minimal in the vicinity of the largest radius (aphelie). Second Kepler's law, the line joining a planet and the Sun sweeps out equal areas during equal intervals of time. The planet moves faster near the Sun, so the same area is swept out in a given time as at larger distances, where the planet moves more slowl

PIX4629399: Kepler's Law - Illustration - The segment that connects the planet to the Sun sweeps equal areas in equal times. In other words, the speed of a planet becomes greater when the planet approaches the Sun. It is maximum in the vicinity of the shortest radius (perihelie), and minimal in the vicinity of the largest radius (aphelie). Second Kepler's law, the line joining a planet and the Sun sweeps out equal areas during equal intervals of time. The planet moves faster near the Sun, so the same area is swept out in a given time as at larger distances, where the planet moves more slowl / Bridgeman Images

Geocentric System of Ptolemee - Ptolemaic Cosmology - Engraving from “Harmonia Macrocosmica” by Andreas Cellarius, 1708. The planisphere of Ptolemy, or the mechanism of the heavenly orbits following the hypothesis of Ptolemy laid out in a planar view. Plate of the Harmonia Macrocosmica of Andreas Cellarius, 1708
Geocentric System of Ptolemee - Ptolemaic Cosmology - Engraving from “Harmonia Macrocosmica” by Andreas Cellarius, 1708. The planisphere of Ptolemy, or the mechanism of the heavenly orbits following the hypothesis of Ptolemy laid out in a planar view. Plate of the Harmonia Macrocosmica of Andreas Cellarius, 1708

PIX4629421: Geocentric System of Ptolemee - Ptolemaic Cosmology - Engraving from “Harmonia Macrocosmica” by Andreas Cellarius, 1708. The planisphere of Ptolemy, or the mechanism of the heavenly orbits following the hypothesis of Ptolemy laid out in a planar view. Plate of the Harmonia Macrocosmica of Andreas Cellarius, 1708 / Bridgeman Images

Buildings of a superquadra in Brasilia (Brazil).Photography 16/04/07
Buildings of a superquadra in Brasilia (Brazil).Photography 16/04/07

TEC4629511: Buildings of a superquadra in Brasilia (Brazil).Photography 16/04/07 / Bridgeman Images

Geocentric System according to Aratus - Geocentric System - Representation of the geocentric system according to Aratus (Aratos de Soles). Engraving from “Harmonia Macrocosmica” by Andreas Cellarius, 1660-1661. The planisphere of Aratus, or the mechanism of the heavenly orbits following the hypothesis of Aratus laid out in a planar view. Plate of the Harmonia Macrocosmica of Andreas Cellarius, 1660-1661
Geocentric System according to Aratus - Geocentric System - Representation of the geocentric system according to Aratus (Aratos de Soles). Engraving from “Harmonia Macrocosmica” by Andreas Cellarius, 1660-1661. The planisphere of Aratus, or the mechanism of the heavenly orbits following the hypothesis of Aratus laid out in a planar view. Plate of the Harmonia Macrocosmica of Andreas Cellarius, 1660-1661

PIX4629516: Geocentric System according to Aratus - Geocentric System - Representation of the geocentric system according to Aratus (Aratos de Soles). Engraving from “Harmonia Macrocosmica” by Andreas Cellarius, 1660-1661. The planisphere of Aratus, or the mechanism of the heavenly orbits following the hypothesis of Aratus laid out in a planar view. Plate of the Harmonia Macrocosmica of Andreas Cellarius, 1660-1661 / Bridgeman Images

Housing building of a superquadra in Brasilia (Brazil).
Housing building of a superquadra in Brasilia (Brazil).

TEC4629520: Housing building of a superquadra in Brasilia (Brazil). / Bridgeman Images

Comparison of the sizes of the Earth and the Moon - Diameter of the Earth: 12.756,28 km Diameter of the Moon: 3474.8 k
Comparison of the sizes of the Earth and the Moon - Diameter of the Earth: 12.756,28 km Diameter of the Moon: 3474.8 k

PIX4629738: Comparison of the sizes of the Earth and the Moon - Diameter of the Earth: 12.756,28 km Diameter of the Moon: 3474.8 k / Bridgeman Images

The southern banking sector in Brasilia (Brazil).
The southern banking sector in Brasilia (Brazil).

TEC4629777: The southern banking sector in Brasilia (Brazil). / Bridgeman Images

Abribus a Brasilia (Brazil).
Abribus a Brasilia (Brazil).

TEC4629820: Abribus a Brasilia (Brazil). / Bridgeman Images

A superquadra building in Brasilia (Brazil).
A superquadra building in Brasilia (Brazil).

TEC4629847: A superquadra building in Brasilia (Brazil). / Bridgeman Images

Corsica seen from the International Space Station (ISS) 12-2016 - Corsica from ISS 12-2016:
Corsica seen from the International Space Station (ISS) 12-2016 - Corsica from ISS 12-2016:

PIX4665254: Corsica seen from the International Space Station (ISS) 12-2016 - Corsica from ISS 12-2016: / Bridgeman Images

La Rochelle et l'ile de Re - Photo satellite - Satellite image of La Rochelle - France: La Rochelle et l'île de Re observed by satellite Sentinel-2A on 26 December 2015. - Capital of the Charente-Maritime department in western France, La Rochelle and surroundings are featured in this Sentinel-2A image, captured on 26 December 2015. Home to some 80,000 people, La Rochelle is a city and a seaport on the Bay of Biscay, a part of the Atlantic Ocean, connected to the Ile de Re by a 2.9 km-long bridge, clearly visible in the centre of the image
La Rochelle et l'ile de Re - Photo satellite - Satellite image of La Rochelle - France: La Rochelle et l'île de Re observed by satellite Sentinel-2A on 26 December 2015. - Capital of the Charente-Maritime department in western France, La Rochelle and surroundings are featured in this Sentinel-2A image, captured on 26 December 2015. Home to some 80,000 people, La Rochelle is a city and a seaport on the Bay of Biscay, a part of the Atlantic Ocean, connected to the Ile de Re by a 2.9 km-long bridge, clearly visible in the centre of the image

PIX4665258: La Rochelle et l'ile de Re - Photo satellite - Satellite image of La Rochelle - France: La Rochelle et l'île de Re observed by satellite Sentinel-2A on 26 December 2015. - Capital of the Charente-Maritime department in western France, La Rochelle and surroundings are featured in this Sentinel-2A image, captured on 26 December 2015. Home to some 80,000 people, La Rochelle is a city and a seaport on the Bay of Biscay, a part of the Atlantic Ocean, connected to the Ile de Re by a 2.9 km-long bridge, clearly visible in the centre of the image / Bridgeman Images

Corsica view by satellite - Corsica seen by satellite Landsat-8 - Corsica seen by satellite Landsat-8 on 29 August 2014.
Corsica view by satellite - Corsica seen by satellite Landsat-8 - Corsica seen by satellite Landsat-8 on 29 August 2014.

PIX4665266: Corsica view by satellite - Corsica seen by satellite Landsat-8 - Corsica seen by satellite Landsat-8 on 29 August 2014. / Bridgeman Images

The Church Dom Bosco in Brasilia (Brazil), built in 1980.
The Church Dom Bosco in Brasilia (Brazil), built in 1980.

TEC4665503: The Church Dom Bosco in Brasilia (Brazil), built in 1980. / Bridgeman Images

The Church Dom Bosco in Brasilia (Brazil), built in 1980.
The Church Dom Bosco in Brasilia (Brazil), built in 1980.

TEC4665512: The Church Dom Bosco in Brasilia (Brazil), built in 1980. / Bridgeman Images

Plaque de la rue Cassini in Paris - Street Plaque in Paris - Rue du 14eme arrondissement de Paris, in tribute to the Italian astronomer Jean - Dominique Cassini (1625 - 1712), naturalise French in 1673. Attrained to France by Colbert in 1669, he became the first director of the Paris Observatory in 1671, at the request of Louis XIV. In 1665, he discovered Jupiter's Grande Tache Rouge and determined the rotation speeds of Venus, Mars and Jupiter. From 1671 he discovered 4 satellites around Saturn, as well as a separation in the rings, which today bears his name (division of Cassini). In 1673, he made the first precise measurement of the distance from Earth to Sun, thanks to a transit of Venus. Rue Cassini, street sign. Astronomer Jean - Dominique Cassini, was the first director of Paris observatory
Plaque de la rue Cassini in Paris - Street Plaque in Paris - Rue du 14eme arrondissement de Paris, in tribute to the Italian astronomer Jean - Dominique Cassini (1625 - 1712), naturalise French in 1673. Attrained to France by Colbert in 1669, he became the first director of the Paris Observatory in 1671, at the request of Louis XIV. In 1665, he discovered Jupiter's Grande Tache Rouge and determined the rotation speeds of Venus, Mars and Jupiter. From 1671 he discovered 4 satellites around Saturn, as well as a separation in the rings, which today bears his name (division of Cassini). In 1673, he made the first precise measurement of the distance from Earth to Sun, thanks to a transit of Venus. Rue Cassini, street sign. Astronomer Jean - Dominique Cassini, was the first director of Paris observatory

PIX4665539: Plaque de la rue Cassini in Paris - Street Plaque in Paris - Rue du 14eme arrondissement de Paris, in tribute to the Italian astronomer Jean - Dominique Cassini (1625 - 1712), naturalise French in 1673. Attrained to France by Colbert in 1669, he became the first director of the Paris Observatory in 1671, at the request of Louis XIV. In 1665, he discovered Jupiter's Grande Tache Rouge and determined the rotation speeds of Venus, Mars and Jupiter. From 1671 he discovered 4 satellites around Saturn, as well as a separation in the rings, which today bears his name (division of Cassini). In 1673, he made the first precise measurement of the distance from Earth to Sun, thanks to a transit of Venus. Rue Cassini, street sign. Astronomer Jean - Dominique Cassini, was the first director of Paris observatory / Bridgeman Images

Plaque de la rue Janssen a Paris - Street Plaque in Paris - Rue du XIXeme arrondissement de Paris, in tribute to Jules Janssen (1824 - 1907). A pioneer of astronomical photography, he created the first images of solar granulation. He was the founder of the Observatoire de Meudon, which he directed from 1876 until his death. Janssen Street, street sign. Jules Janssen (1824 - 1907) was a english astronomer, director of Meudon observatory
Plaque de la rue Janssen a Paris - Street Plaque in Paris - Rue du XIXeme arrondissement de Paris, in tribute to Jules Janssen (1824 - 1907). A pioneer of astronomical photography, he created the first images of solar granulation. He was the founder of the Observatoire de Meudon, which he directed from 1876 until his death. Janssen Street, street sign. Jules Janssen (1824 - 1907) was a english astronomer, director of Meudon observatory

PIX4665636: Plaque de la rue Janssen a Paris - Street Plaque in Paris - Rue du XIXeme arrondissement de Paris, in tribute to Jules Janssen (1824 - 1907). A pioneer of astronomical photography, he created the first images of solar granulation. He was the founder of the Observatoire de Meudon, which he directed from 1876 until his death. Janssen Street, street sign. Jules Janssen (1824 - 1907) was a english astronomer, director of Meudon observatory / Bridgeman Images

Plaque de la rue de la Mire in Paris - Street Plaque in Paris - Rue du XVIIIème arrondissement de Paris. It owes its name to the Mire du Nord, although it is located on Junot Avenue. Rue de la Mire, street sign
Plaque de la rue de la Mire in Paris - Street Plaque in Paris - Rue du XVIIIème arrondissement de Paris. It owes its name to the Mire du Nord, although it is located on Junot Avenue. Rue de la Mire, street sign

PIX4665733: Plaque de la rue de la Mire in Paris - Street Plaque in Paris - Rue du XVIIIème arrondissement de Paris. It owes its name to the Mire du Nord, although it is located on Junot Avenue. Rue de la Mire, street sign / Bridgeman Images

Mediterranean Sea and Detroit of Gibraltar seen from Space - Strait of Gibraltar and Mediterranean sea from space - The Detroit of Gibraltar seen by the International Space Station (ISS) in 2001. Morocco is on the left, Spain is on the right. Strait of Gibraltar as seen from the International Space Station (ISS) in 2001. Morocco is visible on the left, and Spain on the right
Mediterranean Sea and Detroit of Gibraltar seen from Space - Strait of Gibraltar and Mediterranean sea from space - The Detroit of Gibraltar seen by the International Space Station (ISS) in 2001. Morocco is on the left, Spain is on the right. Strait of Gibraltar as seen from the International Space Station (ISS) in 2001. Morocco is visible on the left, and Spain on the right

PIX4665864: Mediterranean Sea and Detroit of Gibraltar seen from Space - Strait of Gibraltar and Mediterranean sea from space - The Detroit of Gibraltar seen by the International Space Station (ISS) in 2001. Morocco is on the left, Spain is on the right. Strait of Gibraltar as seen from the International Space Station (ISS) in 2001. Morocco is visible on the left, and Spain on the right / Bridgeman Images

Reflection of the Sun on Greece seen from the International Space Station on June 10, 2001
Reflection of the Sun on Greece seen from the International Space Station on June 10, 2001

PIX4665907: Reflection of the Sun on Greece seen from the International Space Station on June 10, 2001 / Bridgeman Images

Greece seen by the satellite Envisat 2003 - Greece observed by the Envisat satellite in 2003
Greece seen by the satellite Envisat 2003 - Greece observed by the Envisat satellite in 2003

PIX4665915: Greece seen by the satellite Envisat 2003 - Greece observed by the Envisat satellite in 2003 / Bridgeman Images

English Channel seen from space - English Channel seen from space - La Manche seen by Envisat satellite on 14 July 2003. This image taken by satellite ENVISAT on July 14 2003, shows the English Channel separating the island of Great Britain from northern France, it also connects the North Sea to the Atlantic. The Strait of Dover is the narrowest point, only 34 km, from Dover to Cape Gris - Nez. In the upper part of the image most of England can be observed, from Plymouth to Margate along the coast and from Bristol to London (large bright area). The light green - bluish colours in the sea are the shallow waters of the Goodwin Sands. On the opposite side of the channel are the French regions of Brittany and Lower Normandy. To the left of Lower Normandy are the British islands of Jersey and Guernsey
English Channel seen from space - English Channel seen from space - La Manche seen by Envisat satellite on 14 July 2003. This image taken by satellite ENVISAT on July 14 2003, shows the English Channel separating the island of Great Britain from northern France, it also connects the North Sea to the Atlantic. The Strait of Dover is the narrowest point, only 34 km, from Dover to Cape Gris - Nez. In the upper part of the image most of England can be observed, from Plymouth to Margate along the coast and from Bristol to London (large bright area). The light green - bluish colours in the sea are the shallow waters of the Goodwin Sands. On the opposite side of the channel are the French regions of Brittany and Lower Normandy. To the left of Lower Normandy are the British islands of Jersey and Guernsey

PIX4665078: English Channel seen from space - English Channel seen from space - La Manche seen by Envisat satellite on 14 July 2003. This image taken by satellite ENVISAT on July 14 2003, shows the English Channel separating the island of Great Britain from northern France, it also connects the North Sea to the Atlantic. The Strait of Dover is the narrowest point, only 34 km, from Dover to Cape Gris - Nez. In the upper part of the image most of England can be observed, from Plymouth to Margate along the coast and from Bristol to London (large bright area). The light green - bluish colours in the sea are the shallow waters of the Goodwin Sands. On the opposite side of the channel are the French regions of Brittany and Lower Normandy. To the left of Lower Normandy are the British islands of Jersey and Guernsey / Bridgeman Images

La France vue par satellite - France as seen from satellite - Image de la France obtained on 9 March 2009 by the European satellite Envisat. View of France obtained by the European satellite Envisat on March 9 2009
La France vue par satellite - France as seen from satellite - Image de la France obtained on 9 March 2009 by the European satellite Envisat. View of France obtained by the European satellite Envisat on March 9 2009

PIX4665156: La France vue par satellite - France as seen from satellite - Image de la France obtained on 9 March 2009 by the European satellite Envisat. View of France obtained by the European satellite Envisat on March 9 2009 / Bridgeman Images

La France vue par satellite - France as seen from satellite - Image de la France obtained on 18 May 2009 by the European satellite Envisat. View of France obtained by the European satellite Envisat on May 18 2009
La France vue par satellite - France as seen from satellite - Image de la France obtained on 18 May 2009 by the European satellite Envisat. View of France obtained by the European satellite Envisat on May 18 2009

PIX4665162: La France vue par satellite - France as seen from satellite - Image de la France obtained on 18 May 2009 by the European satellite Envisat. View of France obtained by the European satellite Envisat on May 18 2009 / Bridgeman Images

JK Bridge in Brasilia (Brazil). Architect Alexandre Chan, 2002. Photography 2006.
JK Bridge in Brasilia (Brazil). Architect Alexandre Chan, 2002. Photography 2006.

TEC4665167: JK Bridge in Brasilia (Brazil). Architect Alexandre Chan, 2002. Photography 2006. / Bridgeman Images

Star sky and menhirs of Carnac - Starry sky above standing stones in Carnac - Star sky and menhirs in Carnac alignments. March 2009. Starry sky with standing stones in Carnac, Brittany - France. March 2009
Star sky and menhirs of Carnac - Starry sky above standing stones in Carnac - Star sky and menhirs in Carnac alignments. March 2009. Starry sky with standing stones in Carnac, Brittany - France. March 2009

PIX4665400: Star sky and menhirs of Carnac - Starry sky above standing stones in Carnac - Star sky and menhirs in Carnac alignments. March 2009. Starry sky with standing stones in Carnac, Brittany - France. March 2009 / Bridgeman Images

The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07.
The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07.

TEC4665421: The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07. / Bridgeman Images

The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07.
The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07.

TEC4665439: The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07. / Bridgeman Images

The Church Dom Bosco in Brasilia (Brazil), built in 1980.
The Church Dom Bosco in Brasilia (Brazil), built in 1980.

TEC4665455: The Church Dom Bosco in Brasilia (Brazil), built in 1980. / Bridgeman Images

The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07.
The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07.

TEC4665458: The Museum of Indigenous Cultures of Brasilia (Brazil). Photo 18/04/07. / Bridgeman Images

The Church Dom Bosco in Brasilia (Brazil), built in 1980.
The Church Dom Bosco in Brasilia (Brazil), built in 1980.

TEC4665473: The Church Dom Bosco in Brasilia (Brazil), built in 1980. / Bridgeman Images

Greenland Coast View by Landsat 7 - 09/2000 - Glaciers surrounding Baffin Bay, along the West Coast of Greenland
Greenland Coast View by Landsat 7 - 09/2000 - Glaciers surrounding Baffin Bay, along the West Coast of Greenland

PIX4666051: Greenland Coast View by Landsat 7 - 09/2000 - Glaciers surrounding Baffin Bay, along the West Coast of Greenland / Bridgeman Images

Retreat of the Helheim Glacier, Greenland - Retreat of the Helheim Glacier, Greenland - These three photos show the Helheim Glacier in Greenland in June 2005 (top), July 2003 (middle) and May 2001 (bottom). The glacier occupies the left part of the images, the icebergs on the fjord on the right. Between 2001 and 2005, the glacier front retreated 7.5 km. Images obtained from the Terra satellite. Retreat of the Helheim Glacier, Greenland Along the margin of the Greenland Ice Sheet, outlet glaciers flow as icy rivers through narrow fjords and out to sea. As long as the thickness of the glacier and the depth of the water allow the ice to remain grounded, it stays intact. Where the ice becomes too thin or the water too deep, the edge floats and rapidly crumbles into icebergs. Satellite observations of eastern Greenland's Helheim Glacier show that the position of the iceberg's calving front, or margin, has undergone rapid and dramatic change since 2001, and the glacier's flow to the sea has sped up as well. These images from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on Nasa's Terra satellite show the Helheim glacier in June 2005 (top), July 2003 (middle), and May 2001 (bottom). The glacier occupies the left part of the images, while large and small icebergs pack the narrow fjord in the right part of the images. Bare ground appears brown or tan, while vegetation appears in shades of red. From the 1970s until about 2001, the position of the glacier's margin changed little. But between 2001 and 2005, the margin retreated landward about 7.5 kilometers (4.7 miles), and its speed increased from 8 to 11 kilometers per year. Between 2001 and 2003, the glacier also thinned by up to 40 meters (about 131 feet). Overall, the margins of the Greenland Ice Sheet have been thinning by tens of meters over the last decade
Retreat of the Helheim Glacier, Greenland - Retreat of the Helheim Glacier, Greenland - These three photos show the Helheim Glacier in Greenland in June 2005 (top), July 2003 (middle) and May 2001 (bottom). The glacier occupies the left part of the images, the icebergs on the fjord on the right. Between 2001 and 2005, the glacier front retreated 7.5 km. Images obtained from the Terra satellite. Retreat of the Helheim Glacier, Greenland Along the margin of the Greenland Ice Sheet, outlet glaciers flow as icy rivers through narrow fjords and out to sea. As long as the thickness of the glacier and the depth of the water allow the ice to remain grounded, it stays intact. Where the ice becomes too thin or the water too deep, the edge floats and rapidly crumbles into icebergs. Satellite observations of eastern Greenland's Helheim Glacier show that the position of the iceberg's calving front, or margin, has undergone rapid and dramatic change since 2001, and the glacier's flow to the sea has sped up as well. These images from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on Nasa's Terra satellite show the Helheim glacier in June 2005 (top), July 2003 (middle), and May 2001 (bottom). The glacier occupies the left part of the images, while large and small icebergs pack the narrow fjord in the right part of the images. Bare ground appears brown or tan, while vegetation appears in shades of red. From the 1970s until about 2001, the position of the glacier's margin changed little. But between 2001 and 2005, the margin retreated landward about 7.5 kilometers (4.7 miles), and its speed increased from 8 to 11 kilometers per year. Between 2001 and 2003, the glacier also thinned by up to 40 meters (about 131 feet). Overall, the margins of the Greenland Ice Sheet have been thinning by tens of meters over the last decade

PIX4666053: Retreat of the Helheim Glacier, Greenland - Retreat of the Helheim Glacier, Greenland - These three photos show the Helheim Glacier in Greenland in June 2005 (top), July 2003 (middle) and May 2001 (bottom). The glacier occupies the left part of the images, the icebergs on the fjord on the right. Between 2001 and 2005, the glacier front retreated 7.5 km. Images obtained from the Terra satellite. Retreat of the Helheim Glacier, Greenland Along the margin of the Greenland Ice Sheet, outlet glaciers flow as icy rivers through narrow fjords and out to sea. As long as the thickness of the glacier and the depth of the water allow the ice to remain grounded, it stays intact. Where the ice becomes too thin or the water too deep, the edge floats and rapidly crumbles into icebergs. Satellite observations of eastern Greenland's Helheim Glacier show that the position of the iceberg's calving front, or margin, has undergone rapid and dramatic change since 2001, and the glacier's flow to the sea has sped up as well. These images from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on Nasa's Terra satellite show the Helheim glacier in June 2005 (top), July 2003 (middle), and May 2001 (bottom). The glacier occupies the left part of the images, while large and small icebergs pack the narrow fjord in the right part of the images. Bare ground appears brown or tan, while vegetation appears in shades of red. From the 1970s until about 2001, the position of the glacier's margin changed little. But between 2001 and 2005, the margin retreated landward about 7.5 kilometers (4.7 miles), and its speed increased from 8 to 11 kilometers per year. Between 2001 and 2003, the glacier also thinned by up to 40 meters (about 131 feet). Overall, the margins of the Greenland Ice Sheet have been thinning by tens of meters over the last decade / Bridgeman Images


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