but a small fraction of the debris may one day

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    WASHINGTON Cheap NFL Football Jerseys , March 6 (Xinhua) -- Astronomers said Thursday they have witnessed for the first time the breakup of an asteroid, disintegrating into as many as 10 smaller pieces at a "leisurely" speed.



    The crumbling asteroid, designated P2013 R3, was first noticed as an unusual, fuzzy-looking object by ground-based telescopes in Arizona on Sept. 15, 2013 Cheap Football Jerseys , the researchers reported in the U.S. journal Astrophysical Journal Letters.



    A follow-up observation on Oct. 1 with the W. M. Keck Observatory on the summit of Mauna Kea, a dormant volcano on the island of Hawaii, revealed three bodies moving together in an envelope of dust nearly the diameter of Earth.



    Astronomers then looked at it with the Hubble Space Telescope, which soon showed there were really 10 embedded objects, each with comet-like dust tails, said David Jewitt of the University of California at Los Angeles Cheap Nike NFL Jerseys , who led the astronomical forensics investigation.



    The four largest rocky fragments are up to 400 yards (365.76 m) in diameter, about four times the length of a football field, Jewitt said. "Seeing this rock fall apart before our eyes is pretty amazing."



    The asteroid began coming apart early last year, and the researchers said the fragments are drifting away from each other at a leisurely pace of one mile (about 1.6 kilometer) per hour.



    The researchers said the rare event is not caused by a collision with another asteroid, or the pressure of interior ices warming and vaporizing.



    They suspected the break-up is a result of sunlight, which causes the rotation rate of the asteroid to gradually increase. Eventually Cheap NFL Jerseys From China , its component pieces succumb to centrifugal force and gently pull apart, "like grapes on a stem", they said.



    The possibility of disruption in this manner, known as the YORP effect, has been discussed by scientists for several years, but never reliably observed.



    The asteroid's remnant debris Cheap NFL Jerseys China , weighing about 200,000 tons, will in the future provide a rich source of meteoroids, Jewitt said.



    Most will eventually plunge into the sun, but a small fraction of the debris may one day blaze across our skies as meteors, he added.

    "

    DHAKA Cheap NFL Jerseys Wholesale , Aug. 9 (Xinhua) -- Driven by ready-made garments, Bangladesh's exports in the first month of the current 2017-18 fiscal year ending next June surged over 26 percent to 3.21 billion U.S. dollars, said an official Wednesday.



    The Export Promotion Bureau (EPB) official told Xinhua that export performance for July was 3.207 billion U.S. dollars, 26.54 percent higher than that in the same month a year ago.



    Despite robust growth, the official who preferred to be unnamed said Bangladesh's July export earnings were about 1 percent lower than the 3.239 billion U.S. dollars target set for the last month.



    Of the total earnings, he said the country's income from ready-made garment items Cheap NFL Jerseys Discount , including knitwear and woven, stood at about 2.48 billion U.S. dollars in the last month of the current fiscal year.



    The EPB data showed knitwear garment export grew 17.28 percent to 1.26 billion U.S. dollars while woven garments increased 16.88 percent to 1.22 billion U.S. dollars, comparing with the same period of last fiscal year.



    It showed Bangladesh's export income in the past 2016-17 fiscal year grew 1.69 percent year-on-year to reach 34.66 billion U. S. dollars, falling short of the projected target by 5.85 percent.



    Bangladesh set its export target in 2017-18 fiscal year at 37.50 billion U.S. dollars, including 30.16 billion U.S. dollars from ready-made garment products, the EPB data showed.



    Aftermath of 7.0-magnitude quake in Jiuzhaigou Cheap NFL Jerseys , SW China



    70 years of ethnic autonomy means solidarity, prosperity



    German-Chinese Law Dictionary launched in Berlin



    Death toll rises to 24 from flash flood in SW China



    People mark national Fitness Day around China



    Aerial view of Gula Town in S China



    Qiandao Lake: Home to 114 known fish species



    Delicious in-flight meal for BRICS Summit

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