GUIYANG nike air max 97 bianche uomo , July 23 (Xinhua) -- Technicians began assembling the world's largest radio telescope, whose dish is the size of 30 football grounds, deep in the mountains of southwest China's Guizhou Province on Thursday.
In the afternoon, technicians began to assemble the telescope's reflector, which is 500 meters in diameter and made up of 4,450 panels. Each panel is an equilateral triangle with a side length of 11 meters.
Once completed, the single-aperture spherical telescope called "FAST" will be the world's largest nike air max 97 gold uomo , overtaking Puerto Rico's Arecibo Observatory, which is 300 meters in diameter.
Nan Rendong, chief scientist of the FAST project with the National Astronomical Observatory, Chinese Academy of Sciences, told Xinhua that the bigger the dish is, the more capable the telescope is and the weaker messages it will receive.
"A radio telescope is like a sensitive ear, listening to tell meaningful radio messages from white noise in the universe. It is like identifying the sound of cicadas in a thunderstorm nike air max 97 nere uomo ," he said.
With a perimeter of about 1.6 km, it will take about 40 minutes to walk around the telescope.
The giant dish is built upon a naturally-formed bowl-like valley in the southern part of Guizhou.
"There are three hills about 500 meters away from one another, creating a valley that is perfect to support the telescope," said Sun Caihong, chief engineer of FAST's construction, explaining the reason why this site was chosen.
The Karst formation in the local landscape is good for draining rainwater underground and protecting the reflector, Sun said.
The surrounding area has "radio silence" as there are no towns and cities within a sphere of five km and only one county center within a sphere of 25 km nike air max 97 silver uomo , he said.
The huge dish is actually hung over the ground supported by thousands of steel pillars and cables. There will be maintenance passages under it.
To overlook the whole reflector, visitors have to climb up to the top of one of the hills. A hill-top observation platform is under construction and will be open to the public, Sun said.
Not only will it be huge, the new telescope is also very sensitive.
The dish can shift to receive radio from different angles, said Zheng Yuanpeng, chief engineer of the telescope's panel project.
"Panels can change their positions through connected wires and parallel robots. We can control their position with an accuracy of 1 mm," Zheng said.
The new telescope is expected to greatly enhance Chinese scientists' capacity to observe outer space.
Wu Xiangping nike cortez nylon uomo , director-general of Chinese Astronomical Society, said that for years Chinese scientists have worked on "second hand" data collected by others and failed to achieve breakthrough.
"Having a more sensitive telescope, we can receive weaker and more distant radio messages. It will help us to search for intelligent life outside of the galaxy and explore the origins of the universe," Wu said.
The construction of the telescope began in March 2011 and is set to finish next year.
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MANILA, June 21 (Xinhua) -- The Philippines will send 115 athletes who excelled in the recently concluded national sports fest to attend the 5th Association of Southeast Asian Nations (ASEAN) School Games in Vietnam nike cortez ultra moire uomo nere , a senior government official said Friday.
Education Secretary Armin Luistro said that the Department of Education (DepEd) and the Philippine Sports Commission (PSC) have chosen the country's delegates to the June 22 to 30 sports events in Hanoi from the athletes who won gold, silver, and bronze in the 2013 Palarong Pambansa (National Sports Fest).
"We wish our athletes good luck and remind them that they are not only competitors but our ambassadors of goodwill," he said, adding,"the event is an incentive for them and a chance for international exposure as well."
Luistro also expressed his appreciation to the PSC for actively supporting student athletes.
"We will continue to work together to enhance the promotion and development of sports in the country with the hope of producing more world-class athletes," he said.
The 5th ASEAN Schools Games (ASG) will be participated in by over 1 nike cortez ultra moire uomo ,500 athletes and coaches from the Philippines, Brunei, Cambodia, Indonesia, Laos, Malaysia, Singapore nike cortez gialle , Thailand, and Vietnam. The events are track and field, sepak takraw, swimming, badminton, basketball, gymnastics nike cortez grigie , table tennis, volleyball, and pencaksilat.
The Philippines will
Organized under the auspices of the ASEAN Schools Sports Council (ASSC), an apolitical regional sports organization that promotes sports amongst member countries, the ASG aims to enhance friendship among students around the region. It also seeks to promote ASEAN solidarity among the youth through school sports and provide opportunities for school athletes to engage in cultural exchange.
host the 6th ASG next year.
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