[:ja]アレックス・ゲルスト宇宙飛行士がISSから撮影した中国の万里の長城です。
万里の長城は、あまりに有名な中国に存在する城壁の遺跡で、現存する人工壁の延長は6,259kmです。匈奴のような北方の異民族が侵攻してくるのを迎撃するために、秦代の紀元前214年に始皇帝によって建設され始めました。実際にはその後いくつかの王朝によって修築と移転が繰り返され、現存の「万里の長城」の大部分は明代に作られたもので、この現存する明代の長城線は秦代に比べて遥かに南へ後退しています。
地上の様子はこちらです。
参考文献： Alex Gerst’s Tweet
ウェブ地球儀で地球俯瞰画像を見る： LiVEARTH[:en][Earthview Wonders] No.534: Great Wall of China🇨🇳
Astronaut Alex Gerst captured from ISS the Great Wall of China.
The Great Wall of China was built along the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe with an eye to expansion. Several walls were being built as early as the 7th century BC, but the majority of the existing wall is from the Ming Dynasty (1368–1644). A comprehensive archaeological survey, using advanced technologies, has concluded that the walls built by the Ming dynasty measure 8,850km, including 6,259km sections of actual wall. Today, the Great Wall is generally recognized as one of the most impressive architectural feats in history.
The local scenery on the ground is as follows.
Reference: Alex Gerst’s Tweet
See earthview photo gallery with web-globe: LiVEARTH
[Earthview Wonders] No.534: Great Wall of China🇨🇳
Astronaut Alex Gerst captured from ISS the Great Wall of China.
The Great Wall of China was built along the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe with an eye to expansion. Several walls were being built as early as the 7th century BC, but the majority of the existing wall is from the Ming Dynasty (1368–1644). A comprehensive archaeological survey, using advanced technologies, has concluded that the walls built by the Ming dynasty measure 8,850km, including 6,259km sections of actual wall. Today, the Great Wall is generally recognized as one of the most impressive architectural feats in history.
The local scenery on the ground is as follows.
Reference: Alex Gerst’s Tweet
See earthview photo gallery with web-globe: LiVEARTH[:]