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Saturday, June 2, 2012

A dwarf galaxy that is about 70 million light years from Earth


Most galaxies in the universe are classified into three forms: elliptical, disc-and usually flattened, and irregular spiral arms. That is so strange Leda 074886, a dwarf galaxy that is about 70 million light years from Earth is rectangular or, as astronomers have discovered, like a bright emerald. 
"It's one of those things that just make you smile because it should not exist or, rather, did not expect to exist," says Alsiter Graham (Swinburne University of Technology in Melbourne, Australia), lead researcher. 
Scientists had noted the Japanese Subaru telescope (primary mirror 8.2 meters in diameter and located in the Mauna Kea Observatory in Hawaii) to a cluster of stars that are around the giant galaxy NGC 1407, and on the edge image using a camera, were equivalent to a wide angle photo-discovered the strange rectangular galaxy. 

Graham and colleagues from Australia, Germany, Switzerland and Finland present their discovery in the journal Astrophysical Journal, in an article entitled precisely Leda 074886 is a striking rectangular galaxy, according to the National Astronomical Observatory of Japan. 

Leda 074886 is not easy to see because it is very bright, given its low intrinsic brightness. It has 50 times fewer stars than the Milky Way and the distance that the Earth is equivalent to line up one after another, 700 galaxies like ours, which is about 100,000 light years across, say the makers of Subaru. 

Astronomers have proposed the reason for this unexpected star of the whole rectangular shape, which, they acknowledge, may have much to do with the focus that has seen from Earth. "One possibility is to be formed by the collision of two spiral galaxies, so that stars existed in them remain distributed in the orbits thus creating major diamond cutting, while the gas is concentrated in the median plane where condensed to form our star and the disk we see, "said Duncan Forbes, also of Swinburne University. 

"Maybe when our Milky Way disc shaped collision with the Andromeda galaxy, in about 3,000 million years, end up belonging to a rectangular-looking galaxy," say the scientists from Subaru. 


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