Monday, January 15, 2018

NASA discovers farthest known galaxy in the universe





In a breakthrough discovery, NASA scientists have spotted the farthest known galaxy in the universe which is less than 2,500 lights years across. It is 500 million years old primitive cluster of stars.

An intensive survey deep into the universe by Nasa’s Hubble and Spitzer space telescopes has yielded the image of the galaxy named SPT0615-JD, stretched and amplified by a phenomenon called gravitational lensing. Though a few other primitive galaxies have been seen at this early epoch, they have essentially all looked like red dots given their small size and tremendous distances.

However, in this case, the gravitational field of a massive foreground galaxy cluster not only amplified the light from the background galaxy but also smeared the image of it into an arc. “No other candidate galaxy has been found at such a great distance that also gives you the spatial information that this arc image does,” said Brett Salmon of the Space Telescope Science Institute in the US.

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