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05-01-2016, 04:49 AM
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Africa?s giant eye in the sky proving worth its SALT
Quick reaction times, as well as being significantly cheaper than similar European or American facilities in producing the science are key competitive advantages, said a senior astro**mer at the SALT consortium during a media visit. “SALT is **w living up to expectations, producing high-quality science data that probe the far reaches of the universe,” said Ted Williams, a director at the South African Astro**mical Observatory managing the site. Scientists k**w of neutron stars, large objects about the size of the Sun that have compacted down at the end of their lives to something about 10 km across, the last stop before a black hole. Williams said these incredibly dense objects have been k**wn for decades to produce pulsars, which emit regular pulses of radio waves and other electromagnetic radiation at rates of up to one thousand pulses per second. “But there is a**ther class of compact objects called white dwarfs, bigger, the size of the earth. So rather than 10 kilometres in size we are looking at 6,000 kilometres and we’ve just discovered the very first white dwarf pulsar,” he said of the previously unk**wn celestial phe**mena. Situated atop a hill in the desolate **rthern Cape around 350 km **rth of Cape Town, the $43 million SALT telescope used its powerful spectroscopy light measurement tool to prove the existence of the white dwarf pulsar. Shared by a consortium of partners from South Africa, India, America and Europe, SALT’s queuing system allows it to interrupt routine observations and within minutes focus its 10-metre optical telescope on new discoveries, said Williams. In February, SALT was the first major telescope to take a spectrum of a super**va in the nearby Centaurus A galaxy hours after its discovery. It also helped reveal one of the biggest explosions ever recorded in the universe, 200 times more powerful than a typical super**va and believed to have shone at 570 billion times the brightness of the Sun. “It is what we wanted for South Africa and for Africa, **t to stay at the margins but actually at the centre and beginning to do world-class quality work,” said Naledi Pandor, South Africa’s science minister who visited the telescope on Friday. Together with Australia, South Africa is also co-hosting the world’s biggest and most advanced radio telescope, the $2 billion “Square Kilometre Array” which will study the origins of the universe and help probe for extraterrestrial life. أكثر... ??????? ??????: Africa?s giant eye in the sky proving worth its SALT || ??????: ahlam1399 || ??????: اسم منتداك
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