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Sunday, 18 November 2012

Farthest Known Galaxy in the Universe Discovered

A new celestial wonder has stolen the title of most distant object ever seen in the universe, astronomers report.
The new record holder is the galaxy MACS0647-JD, which is about 13.3 billion light-years away. The universe itself is only 13.7 billion years old, so this galaxy's light has been traveling toward us for almost the whole history of space and time.
Astronomers spotted the object using NASA's Hubble and Spitzer space telescopes, with the aid of a naturally occurring cosmic zoom lens as well. This lens is a huge cluster of galaxies whose collective gravity warps space-time, producing what's called a gravitational lens. As the distant galaxy's light traveled through this lens on its way to Earth, it was magnified.
"This cluster does what no manmade telescope can do," Marc Postman of the Space Telescope Science Institute in Baltimore, Md., said in a statement unveiling the discovery today (Nov. 15). "Without the magnification, it would require a Herculean effort to observe this galaxy." Postman leads the Cluster Lensing And Supernova Survey with Hubble (CLASH), which performed the study.

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