About Us   Jobs   Contact Us      


 
Google  

Great Wall Not Readily Discernible From Space: CAS
    2007-03-01 11:01:11     CRIENGLISH.com
The human naked eye is not actually able to see the Great Wall of China from outer space, research from the Chinese Academy of Sciences (CAS) has confirmed.

China News Service reports an article issued on the Science & Technology Review, co-written by research staff with the Academy of Opto-Electronics under the CAS, stating that people are able to see the Great Wall from the space only with the help of optical equipment.

The Science & Technology Review is a journal published by the China Association for Science and Technology. Established in 1980 by Dr. Yang Zhenning, the Chinese-American recipient of a Nobel Prize, the journal is able to eye science and technology research from all over the world.

According to the paper worked out by Dai Changda, Jiang Xiaoguang and Xi Xiaohuan, the range of human sight is actually limited by distance and by the size of the objects themselves.

People are able to see a 10 square meters object within the extreme distance of 36 kilometers, the paper says, much shorter than the 100 or more kilometers.

The paper said the general width of the Great Wall is two meters with the widest part on the watchtowers spanning up to five or six meters. According to such calculations, the human eye positioned in outer space and usually more than 100 kilometers away from the ground should be unable to discern the wall without recourse to special equipment.

Three taikonauts in China's manned space tours, Shenzhou V and Shenzhou VI, have also admitted that they couldn't see the Great Wall from the outer space.

Many Chinese believed people could only see the Great Wall by eyes from the outer space in addition to the sea walls in the Netherlands. However disputes have been triggered in recent years since controversial voices pledged it's untrue.

The researchers said that optical apparatus can extend human sight to catch Great Wall-like thin-and-long terrestrial objects.

The reports acknowledge that a Chinese-American astronaut only developed his pictures of the Great Wall through use of his digital camera's ultra-high-definition function.

Share

                  
Recommend


CRIENGLISH.com claims the copyright of all material and information produced originally by our staff. All rights reserved. Reproduction of text for non-commercial purposes only is permitted provided that both the source and author are acknowledged and a notifying email is sent to us.

CRIENGLISH.com holds neither liability nor responsibility for materials attributed to any other source. Such information is provided as reportage and dissemination of information but does not necessarily reflect the opinion of or endorsement by CRI.

Also on our site
China | World
• Russian Natural Gas Supplies to Balkans Halted
• Three Israeli Soldiers Killed in Friendly Fire in Gaza
• Polanski's Lawyers Seek to Have Sex Case Dismissed
• Foreign Journalists still Not Allowed into Gaza
• US VP-elect Joe Biden to Visit Pakistan
• China Curbs Overseas Trips on Public Expense
Business | Sports | SciTech
• China Issues Long-awaited 3G Licenses
• Wahaha, Danone Start Trademark Arbitration
• GM Reports 31 Percent Sales Decline in U.S. Market
• Call for More Overseas Talents
• Bulgarian Figure Skating Champion Sentenced to 2.5 Years in Prison
• China's Mission to Mars Set for Take-off
Life | Showbiz
• A Seemingly Endless Scandal
• Asian Art Top Show Kicks off in Beijing
• Behind-the-Scene Photos of "Look for a Star"
• Universal Pictures Movies Set New B.O. Record in 2008
• Tan Dun's Deep Pool of talent
• Top 10 Shows in 2008 
Webcast  
• China Drive, Afternoon, 2009-01-07
• China Drive, Afternoon, 2009-01-06
• China Drive, Morning, 2009-01-06
• Official Property Declaration System
• India handed over evidence of Mumbai attacks to Pakistan
• EU delegation holds talks to push for a cease-fire in Gaza
• Mubarak Meets with EU Troika on Gaza Situation
• Bush says any Gaza ceasefire must stop Hamas rocket fire
 
View the Messages