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時間:2022-08-16 來源:本站 點擊:258次
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NASA's new space telescope reaches destination in solar orbit******

NASA's James Webb Space Telescope, designed to give the world an unprecedented glimpse of infant galaxies in the early stages of the universe, arrived at its gravitational parking spot in orbit around the sun on Monday, nearly a million miles from Earth.

With a final five-minute, course-correcting thrust of its onboard rocket, Webb reached its destination at a position of gravitational equilibrium known as the second Sun-Earth Lagrange point, or L2, one month after launch.

The thruster was activated by mission control engineers at the Space Telescope Science Institute in Baltimore, with radio signals confirming Webb was successfully "inserted" into its desired orbital loop around L2.

Webb will follow a special "halo" path that keeps it in constant alignment with Earth but out of its shadow, as the planet and telescope circle the sun in tandem. The L2 orbit within the larger solar orbit enables uninterrupted radio contact, while bathing Webb's solar-power array in non-stop sunlight.

Minimizing drift

By comparison, Webb's 30-year-old predecessor, the Hubble Space Telescope, orbits the Earth 547 kilometers away, passing in and out of the planet's shadow every 90 minutes.

The combined pull of the sun and Earth at L2 – a point of near gravitational stability first deduced by 18-century mathematician Joseph-Louis Legrange – will minimize the telescope's drift.

But ground teams will need to fire Webb's thruster briefly again about once every three weeks to keep it on track, Keith Parrish, the observatory's commissioning manager from NASA's Goddard Space Flight Center said.

Mission engineers are preparing next to fine-tune the telescope's primary mirror – 18 hexagonal segments of gold-coated beryllium metal measuring 6.5 meters across, far larger than Hubble's main mirror.

EU says to impose sanctions against Russia's recognition of two regions in eastern Ukraine******

AFP

European Union High Representative for Foreign Affairs and Security Policy Josep Borrell arrives for a Foreign Affairs Council meeting at the EU headquarters in Brussels on February 21, 2022.

European Union leaders said on Monday that the bloc will react with sanctions against those involved in Russia's recognition of eastern Ukraine's Lugansk and Donetsk regions as independent states.

In a press statement, European Council President Charles Michel and European Commission President Ursula von der Leyen said they condemn the decision by Russia to recognize the two regions as "independent entities."

"This step is a blatant violation of international law as well as of the Minsk agreements," said the statement. "The Union will react with sanctions against those involved in this illegal act."

The announcement came after Russian President Vladimir Putin signed a decree recognizing "Lugansk People's Republic (LPR)" & "Donetsk People's Republic (DPR)" as independent states on Monday night.

Last week, Russia's State Duma, the lower house of the country's parliament, gave the green light to a bill recognizing the Luhansk and Donetsk republics in east Ukraine's breakaway region of Donbass as independent and sovereign states.

Hours before the announcement of Russia's recognition of the two regions, the European Union's foreign policy chief Josep Borell had warned of sanctions on Russia should it recognize the regions in eastern Ukraine.

"Certainly, if there is annexation there will be sanctions, and if there is recognition I will put the sanctions on the table and the ministers will decide," Borell said during a press conference after a meeting of the bloc's foreign ministers in Brussels.

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Economic Watch: China's Christmas decoration industry recovers, but uncertainties remain******

HANGZHOU, Nov. 26 (Xinhua) -- When the Christmas season is here, relevant industries in China, dampened by the global spread of COVID-19 last year, have been recovering, yet challenges still remain.。

About 80 percent of the world's Christmas products are exported from Yiwu, a global leading small commodities market in east China's Zhejiang Province. This year, Christmas decoration manufacturers there saw rising orders.。

The Yiwu Christmas Products Industry Association, with more than 200 members, said orders increased by 30 percent from last year.。

The total number of orders accounted for about 80 percent of that in 2019, indicating recovery from the COVID-19 pandemic fallout, said Cai Qinliang, secretary-general of the association.。

Dongyang Weijiule Crafts Co., Ltd., a Christmas water lanterns producer, reported its sales volume bounced back to the 2019 level at 30 million yuan (about 4.7 million U.S. dollars).。

Export accounts for about 80 percent of Weijiule's business. To counter pandemic-induced disruptions, the company has stayed in close contact with overseas clients to ensure the delivery of orders since 2020.。

"Overseas demand gradually revived, and orders flocked to us in February, a month earlier than usual," said Qiu Xuemei, general sales manager of the company, adding that she considered it as a relief but also a source of pressure.。

"The pandemic made overseas purchasers too cautious to replenish their stock last year so that many of them saw supply fall short of demand," Qiu explained. "However, the earlier they place the orders, the heavier the pressure we face due to rising raw materials and sea transportation costs."

The rationing of electricity supply has also extended the production cycle, causing possible delivery delays, Qiu noted. Products that failed to catch up with the Christmas season would become an excess inventory of overseas clients, which may drag down their demand next year.。

"Also, the longer production time squeezed our time of developing new products to cater to new preferences which always spawn year after year," said Qiu.。

"Some enterprises slowed down their pace of production while facing those uncertainties, but I believe that the resilient supply chain in China can always be a beacon of hope," said Cai.。

According to Cai, China has a mass of upstream enterprises in the Christmas decoration industry, which can provide a great convenience for Yiwu-based manufacturers while effective control of the COVID-19 also weaves a safety net.。

"Under the uncertainties brought by the pandemic, companies need to develop e-commerce and information technologies to catch up with the times," said Cai, adding that upgrading products is also important.。

Christmas tree pendants, Santa figures and snow globes thronged shelves and counters of Cai's store near the Yiwu International Trade Market as usual. "No matter what happens, people always need some festive atmosphere," he said. Enditem。

National Games witnesses development of China's sports map******

XI'AN, Sept. 27 (Xinhua) -- Su Bingtian from Guangdong Province clocked 9.95 seconds to win the men's 100m final at the 14th National Games last Tuesday, but it took him 12 years to collect his first gold medal from his fourth appearance in the national sports extravaganza.

Su, who lowered the Asian 100m record to 9.83 seconds at the Tokyo Olympics last month, became the first athlete to break the 10-second barrier in the 62-year history of the Games.

As one of the most striking sports in the world, track and field has been featuring in the competition agenda since the inaugural Games in 1959, and producing world-caliber stars to the cheers of the fans both at home and abroad, such as high jumper Zhu Jianhua and hurdler Liu Xiang, both former world record holders.

At the 5th National Games in 1983, Zhu, a Shanghai native, cleared 2.37 meters to break the world record of the men's high jump in the Games qualification on June 11, and bettered it to 2.38 meters three months later in the final.

It was exactly the same year when Liu, an icon in the Chinese sprint, was born in Shanghai.

The Chinese athletes' quest for faster and higher did not stop there. In 2001, Liu won the men's 110m hurdle in 13.36 seconds at the 9th National Games, before setting an Asian record of 13.12 in a Grand Prix in Lausanne the following year. He broke the 13-year-old world record of 12.91 by winning another Grand Prix in 12.88, again in Lausanne on July 12, 2006.

EVENTS CHANGES HIGHLIGHT CHANGING TIMES

Unlike the traditional sport of athletics, rules and events have changed many times in the National Games, representing a snapshot of the times.

At the first National Games, there were 36 competitions, including radio transmitting and receiving, sailing, marine modeling, aircraft parachuting, and aero modeling.

More than 10,000 athletes from 29 delegations competed in the first tournament for the most valued sports accolade since the founding of the People's Republic of China, witnessing four world records broken during that Games.

Zheng Fengrong became the first Chinese female athlete to break a world record. She cleared 1.77 meters to beat the 1.76-meter mark set up by American Mildred McDaniel in the 1956 Melbourne Olympics, remembering the feeling of standing on the Games podium for the first time with her heart still pumping in excitement.

"I broke an American athlete's world record on November 17, 1957. I was the winner of the high jump and triathlon in the first National Games," the 84-year-old recalled.

"The participants in the Games were all students, workers, peasants and soldiers. Although the conditions were harsh and the environment was very plain, we had only one thing in our minds at the time: to win honor for our country," Zheng added.

After China was reinstated to the Olympic family in 1979, the events and rules of the National Games were adjusted in order to better match those of the Olympic Games.

Such a change was most prominent at the sixth National Games in 1987, when many Olympic events were added while many non-Olympic events were removed. At the same time, different scoring methods were implemented for the Olympic and non-Olympic events respectively.

Nowadays, "[2024] Paris Olympic events have been added to the 14th National Games, such as skateboarding, rock climbing, surfing and breakdancing," said Liu Guoyong, director of the Competition and Training Department of General Administration of Sport of China.

AMATEURS, WELCOMED TO NATIONAL GAMES

Apart from being a core stage for athletes, the National Games has also taken steps to seeking a balance between competitive events and the promotion of mass sports during recent years in order to keep in line with the Fitness-for-All national program to improve the health of the public.

Grassroot enthusiasm for sports was echoed throughout the 2008 Beijing Olympics which opened on August 8, the day that was named China's National Fitness Day one year later.

In 2017, mass sports were officially included in the 13th National Games competition agenda, enabling the ordinary people to march onto the national stage to realize their sporting dreams.

The 14th National Games has provided the public an even wider and larger stage with more events, with more than 10,000 people from all walks of life participating.

Undergraduates from sports universities and members of sporting clubs have received their first tickets to the Games, which further enrich the pool of sporting talents for international competitions in the future.

"For the first time, boccia has been included to the mass sport competition at the Games. This can be a milestone in the development of the sport in China," said Yang Jianshe, deputy director of the Boccia Competition Committee at the 14th National Games.

STADIUMS, GYMS MEET PEOPLE'S DAILY NEEDS

Despite the effect of the COVID-19 pandemic, 53 Games venues have been completed on schedule by June 2020, including 30 new ones. These competition venues, which account for approximately 1.4 million square meters of floor space, are spread across 13 competition zones in Shaanxi Province.

The Xi'an Olympic Sports Center, recently certified as a Level 1 venue by the World Athletics, was the stage for the opening and closing ceremonies and also hosted the track and field events of the Games.

Shaanxi has taken the National Games as an opportunity to make up for its deficiencies in sporting infrastructure and to better provide the public with sporting spaces after the Games.

As the centerpiece of the Games, the sports center will be open to the public with a combination of paid and free access, and locals will be guaranteed a "super stadium" view.

"There is an increasing number of sporting venues around us, and all of them are surrounded by a beautiful landscape, equipped with quality facilities and competitively priced," said Liu Ying, a Xi'an native doing physical exercises every day.

To provide a verdant cycling route for the public, the ecological and historical resources of the Qinling Mountains have been utilized to build a network of greenways.

"It's a good environment to cycle in, and the view of mountains and river is elegant," said cycling enthusiast Zhang Tao.

Inspired by the national fitness strategy, several major sporting and fitness-related projects have been launched in Shaanxi. A total of 628 football pitches, 87 county-level public sports venues, 81 sports parks, fitness trails and multi-functional fitness venues have been built across the province.

SHAANXI, FIRST WESTERN HOST PROVINCE

Before 1983, the Games had been hosted only in Beijing, and until the 10th Games in 2005, it was only Beijing, Shanghai and Guangdong who took turns in hosting the Games.

"Before the sixth National Games in 1987, Sichuan Province was approved by the State Council to host the seventh National Games. However, the State Council made a final announcement in 1988 that based on the economic and financial situation of China, the National Games will only be held in Beijing, Shanghai and Guangdong on a rotational basis," explained Yuan Weimin, the former director of General Administration of Sport of China.

As the reform and opening-up policy deepened, China's economy has been thriving and many provinces and cities become capable of hosting major sports games.

In 2001, Jiangsu was awarded the right to host the 10th National Games for the first time outside the previous trio. Shandong, Liaoning and Tianjin were granted the right to host the next three editions of the Games.

Hosted in central and western China for the first time, the 14th National Games is regarded as an opportunity for Shaanxi to promote its development and strengthen its infrastructure.

With changes taking place in almost every area, the Games is just the epitome of the rapid development of western China.

And athletes from across the world will also have their own glimpses through the upcoming World Universiade 2022 in Chengdu, the capital city of southwest Sichuan Province.

The 15th National Games will return to Guangdong in 2025, but this time the southern province is to be joined by Hong Kong and Macao, marking the first time that the two Special Administrative Regions will also become hosts of the Games.

Some participants from Hong Kong and Macao are looking forward to the 15th National Games with four years to go.

Cheng King Leung, acting head of the Hong Kong delegation, believes the next National Games would be a chance for Hong Kong's next generation.

"I'd say the youth of Hong Kong should participate in sports more often, and inherit the sportsmanship of the Chinese people," he said.

"I'm looking forward to meeting all of you at the next National Games," said Au Chi Kun, manager of the Macao track and field team. Enditem

抱歉,你们说的大学生活我真的没见过

1.天热乏力?提神你需要维生素B族!

2.农行新青年|雪域青春 绽放在“生命禁区”

3.北京离婚律师:玩手机都要离 凭奇葩理由能离吗?

4.“中国城市文化综合体”研究课题组成立

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