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BEIJING, Oct. 26 (Xinhuanet) -- The question, why the first documented supernova was super-sized and grew so fast, has puzzled astronomers for centuries. Now it is solved by US researchers.The supernova, an exploded star, was observed in 185 A.D. and documented as a mysterious "guest star" by Chinese astronomers. It was visible for eight months.Scientists later found the supernova, 8,000 light years away, was a bigger-than-expected supernova remnant. BBC reported that if the infrared light it emits could be seen by human eyes, it would appear to be as large as the full Moon in the sky.Through observations in space telescopes, researchers of a latest study revealed that the explosion took place in a cavity in space, which allowed the star's remains to travel out much faster and farther. The study was published online in the Astrophysical Journal Monday.The supernova was "two to three times bigger than we would expect for a supernova that was witnessed exploding nearly 2,000 years ago. Now, we've been able to finally pinpoint the cause," stated Brian Williams, lead author of the study and an astronomer at North Carolina State University in Raleigh.

TEHRAN, Oct. 9 (Xinhua) -- Iran is going to launch domestically- built Navid satellite by Safir satellite launcher by the end of March 2012, the semi-official Mehr news agency reported on Sunday.Navid (promise) is a research satellite and is currently undergoing pre-launch tests, said the report without further details.In June, Iran put the Rasad (surveillance) satellite in the orbit to render images to the country.Iran put a satellite into orbit in 2009 and sent some small animals into space in 2010. It plans to send man into space by 2020.

BEIJING, Jan. 10 (Xinhua) -- China's energy chief said here Tuesday that the country is under greater pressure to ensure energy supply this year as both demand and international competition for resources grows.Liu Tienan, head of the National Energy Administration (NEA), made the remarks when speaking at a national energy work conference."It is always worrisome to have to sustain supply of energy and resources for a country with 1.3 billion people," Liu said.As China is facing a "grim situation" in energy saving and emission reduction, Liu noted, it is urgent to restructure the country's energy use and control the gross consumption volume this year.To ensure a stable energy supply, China will optimize the layout of energy exploration, start construction of energy-transmission projects and other major energy programs while boosting reserves of oil, natural gas and coal in 2012, Liu said.The NEA plans to add another 200 metric tons to the country's coal-producing capacity this year plus 70 million kw of new installed power-generating capacity.If the ecology is protected and people are relocated, China will start construction of hydropower projects of 20 million kw in 2012, according to the NEA.Once safety is ensured, nuclear power will be developed after the country's new safety plan is approved.As for renewable energy development, the NEA plans to launch wind power projects with a total capacity between 15 million kw and 18 million kw, while developing 3 million kw of solar power over the new five-year period ending 2015.Liu said, in 2012, the country aims to provide electricity to another 600,000 people who currently have no access to it and expand electricity access to 5 million people by 2015.The NEA has budgeted 65 billion yuan (10.3 billion U.S. dollars) for upgrading the grids in rural areas.Over the next four years, China will facilitate the development of non-conventional natural gas, such as shale gas and coalbed methane by increasing the number of natural gas users by 100 million to 250 million.A key indicator measuring the economic vitality, power consumption rose 11.7 percent year-on-year to 4.7 trillion kWh in China in 2011. The growth in 2012 is expected to slow to 8.5 percent amid the country's economic slowdown.

BEIJING, Dec. 16 (Xinhua) -- Trade volume between China and the Association of Southeast Asian Nations (ASEAN) in 2010 was 36 times what it was in 1991, the year in which formal relations between the two sides were established, according to new statistics.The volume is expected to reach 500 billion U.S. dollars in 2015, according to figures revealed Friday at the China-ASEAN Beijing Economic Forum, an event taking place in China's capital from Dec. 16 to 18 to commemorate the 20th anniversary of the China-ASEAN relations.Ma Mingqiang, secretary-general of ASEAN-China Center, said China-ASEAN trade volume totaled 267 billion U.S. dollars in the first three quarters of 2011 and is expected to hit the annual target of 350 billion dollars this year.He said the two parties have become closely linked in the past two decades, as China is now ASEAN's largest trade partner while ASEAN ranks the third among China's trade partners.With the comprehensive implementation of the China-ASEAN Free Trade Agreement in 2010, China has made 90 percent of commodities traded between China and ASEAN countries free of tariffs.China and ASEAN have enjoyed rapid social and economic growth since they established bilateral cooperation, said Surin Pitsuwan, ASEAN secretary-general.ASEAN can provide human resources, natural resources and raw materials for China's industrial development, and it in turn wants to win more investment from China, said Pitsuwan.He said the cooperation not only is a win-win solution for both sides, but will also make a positive contribution to the world.Guo Jinlong, mayor of Beijing, said the city saw a 21.5 percent year-on-year increase in trade volume with ASEAN in 2010, and will further strengthen its cooperation with the countries.ASEAN groups Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.

WELLINGTON, Oct. 26 (Xinhua) -- New Zealand's geothermal scientists will be collaborating with the world's leading geothermal researchers after the country joins an elite international group next month.New Zealand would be admitted to the International Partnership for Geothermal Technology (IPGT) in Melbourne, Australia, on Nov. 16, Science and Innovation Minister Wayne Mapp announced Wednesday."Geothermal energy is one of our most important renewable energy resources with huge potential for growth," said Mapp."This recognition of our geothermal research programs will allow our scientists to collaborate with an elite group of researchers in the United States, Australia, Switzerland and Iceland."Scientists from New Zealand research organizations were committed to finding new ways to harness the country's extensive geothermal fields, said Mapp."Innovation and clean energy is a big part of enabling New Zealand to grow the economy," said Mapp."This new international partnership will help keep us at the forefront of technology developments such as enhanced geothermal systems."Established in 2008, the IPGT seeks to develop advanced, cost- effective geothermal energy technologies through international research co-operation.New Zealand's geothermal electricity generation rose by 21 percent last year and accounted for 13 percent of total electricity generation, its highest recorded level.The government is aiming to expand geothermal energy with three large geothermal projects in the pipeline by 2020.The country's biggest geothermal project is to be Contact Energy's 250-megawatt Tauhara II geothermal project.The project, being developed northeast of the central North Island town of Taupo, is expected to produce enough electricity to meet the needs of around 270,000 homes when it becomes fully operational in 2015.