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Old 05-18-2013, 05:50 PM   #1
aabbaDE

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Oct 2005
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Default Head-on crash describes Andromeda's unusual form
A two-decade-long question concerning the weird form of the Milky Way's nearest spiral-shaped universe, Andromeda, is resolved, indicates a fresh research. In the place of getting the smooth plane and outflung hands which are the hallmarks of an adult control universe, Andromeda includes a plane and a few somewhat disorderly, overlapping outer rings. The main reason, based on a global group of astronomers, is the fact that Andromeda experienced a collision with an inferior universe some 210 million years ago. Evidence originates from infrared pictures of Andromeda taken by NASA's orbiting Spitzer Space Telescope. They present a previously invisible, straight 2nd band that projects in the center of the universe. This band will probably function as the shockwave of dust and gas from the crash. The idea is set to the examination in some type of computer simulation. It indicates a dwarf galaxy named M32 possibly went directly into the center of Andromeda, that will be also referred to as M31. "While head-on collisions might have been frequent in the first world, merely a handful are recognized nearby," says the document, whose lead writer is David Block of-the University of Witwatersrand in South Africa. "The finding of 1 within our near-neighbour M31 offers the initial possibility of learning this type of crash at unprecedented spatial resolution." Andromeda, first noticed as "a small cloud" by the Persian astronomer Abd-al-Rahman Al Sufi in 964, is itself headed for a collision using the Milky Way. Nevertheless, both galaxies are far more than 2 million light years apart and the crash will most likely occur between 3 billion and 6 billion years from now. The dwarf universe M32 possibly failed in to the center of Andromeda 210 million years back, setting off shock waves that produced two messy rings, marked in blue and green. ( Image: NASA/JPL/P. Barmby/CfA ) Source
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