Magnificent Einstein Ring Observed in ALMA Images of SDP.81 Galaxy

April 9, 2015 1:29 PM

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The active star-forming galaxy called SDP.81 was discovered in 2010 by the Herschel Space Observatory. Lensed by a massive and comparatively nearby foreground galaxy, it is located approximately 12 billion light-years away from Earth. New images of the galaxy, captured by the Atacama Large Millimeter/submillimeter Array (ALMA), reveals almost perfect Einstein ring.

The images have the highest resolution ever captured with the telescope. In case of SDP.81, the galaxy and the foreground galaxy line up in a perfect manner due to which the light from the more distant one appears as a nearly complete circle when seen from Earth. According to the scientists, it repr...

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