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Category:Tamil films remade in other languagesBy Dan Simons of Nature magazine
Astronomers using NASA’s Hubble Space Telescope have detected a new cluster of galaxies that was forming as much as 11.5 billion years ago. The cluster, called SPT0615-JD, holds clues to how the Universe evolved.
First discovered in 2011, SPT0615-JD is the first of its kind to be found in the distant early Universe. Some of the galaxies in the new cluster were forming before the Big Bang, when the Universe was just a few hundred million years old.
The cluster was discovered by scientists at the South Pole Telescope, a joint project of Harvard University and the National Science Foundation in the US. This joint endeavour is tracking the movement of dark matter using light from distant galaxies.
Hubble data has confirmed that this movement is due to the invisible mass of dark matter, rather than the visible matter that makes up galaxies, stars and planets.
Hubble is like an X-ray machine, sweeping the Universe with light, which allows the telescope to see the faint light from distant galaxies as they were 11.5 billion years ago. It can detect variations in the light from these galaxies due to differences in their distance and motions.
SPT0615-JD was observed using Hubble's Advanced Camera for Surveys (ACS). It is embedded in the Hubble's Wide Field Camera 3.
The cluster has the most distant and most distant known objects within its light-emitting radius, or the so-called'surface brightness'. It also has the highest density of these distant and distant galaxies compared with other clusters of its age, the team says.
"We have found a cluster of galaxies that formed before the Big Bang, and it's the deepest one ever seen at such a young age," says Greg Aldering, a co-author of the study, also of the Harvard Smithsonian Center for Astrophysics. "It was forming stars more than ac619d1d87
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