The Change Mariner

Scientists Discover Faraway Galaxy

The Age (Australia)

In a discovery that offers a rare glimpse back to when the universe was just 750 million years old, astrophysicists have detected a tiny galaxy that is the farthest known object from Earth.

"We are confident it is the most distant known object," California Institute of Technology astronomer Richard Ellis said of the galaxy, which lies roughly 13 billion light-years from Earth.

The team uncovered the faint galaxy using two of the most powerful telescopes - one in space, the other in Hawaii - aided by the natural magnification provided by a massive cluster of galaxies. The gravitational tug of the cluster, called Abell 2218, deflects the light of the distant galaxy and magnifies it many times over.

The magnification process, first proposed by Albert Einstein and known as "gravitational lensing," produces double images of the galaxy.

"Without the magnification of 25 afforded by the foreground cluster, this early object could simply not have been identified or studied in any detail with presently available telescopes," said astronomer Jean-Paul Kneib, of Caltech and the Observatoire Midi-Pyrenees in France.

Posted by Timothy Fredel at February 15, 2004 10:41 PM | TrackBack
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