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Astronomers think the cosmic bullets were ejected from deep within the nebula, likely propelled by strong winds expelling gas at supersonic speeds from a region of massive star formation outside, and below, this image's field-of-view.
MSN: Cosmic 'bullets' slam Orion nebula in dazzling photo
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Such detailed, small-scale measurements of a three-dimensional region of space would be impossible without satellites flying in formation.
ECONOMIST: Birds of a feather
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Outside this region of latitude, other erosional processes can outcompete penitente formation.
BBC: Ice blades threaten Europa landing
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The election of Evo Morales as President of Bolivia late in 2005 and the election of Rafael Correa as President of Ecuador late last year have accelerated the formation of a new Latin American axis which might have serious repercussions for the region in general and also for the United States.
CENTERFORSECURITYPOLICY: A blow to anti-drug policy
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"The high latitude North Atlantic Ocean is a globally important ocean region, as it is a sink for atmospheric carbon dioxide and an area where deep water formation takes place, " Prof Achterberg observed.
BBC: Iceland volcano ash cloud triggers plankton bloom