File:ISS054-E-53958 (Strait of Dover).jpg

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ISS054-E-53958_(Strait_of_Dover).jpg(720 × 480 pixels, file size: 495 KB, MIME type: image/jpeg)

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Summary

Description
English: An astronaut aboard the International Space Station shot this photograph of the Strait of Dover, the narrowest part of the English Channel.

Over the years, adventurous swimmers have attempted to swim the 35-kilometers (21 miles) from Dover, England, to the French coastline at Cap Gris-Nez. Swimmers commonly follow a curved path due to tidal currents, making the actual route longer than the projected straight-line distance between the coasts. This challenge can take swimmers 7 to 20 hours to complete one-way, and few have chosen to swim back.

Dover is famous for its White Cliffs, a section of coastline with abrupt cliffs made of a stark white chalk. The same geologic formation is found across the channel at Cap Blanc-Nez, indicating that the land surface between the two coasts was once continuous. Erosion of this surface over hundreds of thousands of years, followed by rising sea levels in the past 10,000 years, created the English Channel.

Beneath the Strait of Dover, the undersea Channel Tunnel allows trains and cars to quickly travel from southern England to northern France. This helps decrease maritime traffic, as more than 400 commercial vessels cross the Strait daily. Dozens of ships are visible in this photograph.
Deutsch: Ein Astronaut an Bord der Internationalen Raumstation hat dieses Bild aufgenommen von der Straße von Dover, dem engsten Teil des Ärmelkanals.

Im Laufe der Jahre haben zahlreichen Schwimmer versucht, die 35 Kilometer von Dover, England zur französischen Küste bei Cap Gris-Nez zu schwimmen. Die Schwimmer folgen dabei wegen der Gezeitenströmungen einer Kurve, so dass die eigentliche Route länger ist als die direkte Linie zwischen den beiden Küsten. Sie brauchen zwischen sieben und zwanzig Stunden, um in einer Richtung zu schwimmen, und die wenigsten Schwimmer sind auch zurückgeschwommen.

Dover ist bekannt für seine weißen Klippen, einem Küstenabschnitt mit abrupt fallenden Klippen aus weißer Kreide. Dieselbe geologische Formation findet sich auch auf der anderen Seite des Kanals am Cap Blanc-Nez, was darauf hindeutet, dass die beiden Küsten einst zusammen gehörten. Die Erosion dieser Oberfläche im Laufe von hunderttausenden von Jahren und das Ansteigen des Meeresspiegels in den vergangenen 10.000 Jahren haben den Ärmelkanal geschaffen.

Unter der Straße von Dover ermöglicht der Kanaltunnel dem Eisenbahnverkehr, die Meerenge zu unterqueren und Reisende und verladene Fahrzeuge von Südengland nach Nordfrankreich zu bringen und umgekehrt. Dadurch wird der Seeverkehr in dem Meeresgebiet verringert. Mehr als 400 Seeschiffe fahren täglich durch den Ärmelkanal. Auf dem Bild sind Dutzende dieser Schiffe sichtbar.
Date Taken on 
Source https://earthobservatory.nasa.gov/IOTD/view.php?id=92299&eocn=image&eoci=moreiotd
Author Astronaut photograph ISS054-E-53958 was acquired on February 24, 2018, with a Nikon D5 digital camera using a 200 millimeter lens and is provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 54 crew. The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed. Caption by Andrea Meado, Jacobs Technology, JETS Contract at NASA-JSC.

Licensing

Public domain
This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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File history

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Date/TimeThumbnailDimensionsUserComment
current20:37, 27 June 2018Thumbnail for version as of 20:37, 27 June 2018720 × 480 (495 KB)Matthiasb{{Information |description ={{en|1=An astronaut aboard the International Space Station shot this photograph of the Strait of Dover, the narrowest part of the English Channel. Over the years, adventurous swimmers have attempted to swim the 35-kilometers (21 miles) from Dover, England, to the French coastline at Cap Gris-Nez. Swimmers commonly follow a curved path due to tidal currents, making the actual route longer than the projected straight-line distance between the coasts. This challeng...