UDFj-39546284

UDFj-39546284 is a 'stellar structure' (probably a galaxy) reported January 27, 2011 as light from the oldest object. It was detected through infrared observation by the Hubble Space Telescope.C Petit writing for Knight Science Journalism at MIT - tracker  Retrieved 2012-08-10Mann A. 2011. Nature (online) article  It was reported in December 2012 to be at redshift z = 11.9 using Hubble and Spitzer telescope data, including Hubble Ultra-Deep Field (HUDF).R.J. Bouwens et al - Confirmation of the z~10 Candidate UDFj-39546284 using deeper WFC3/IR+ACS+IRAC Observations over the HUDF09/XDF (2012)

The actual stellar source of the light detected no longer exists.popular article of Wednesday January the 26th 2011  written by J Kluger, reporting for Time magazine(online) Retrieved 2012-08-10 (article originally sourced  by C Petit)C Petit - review of - Science News written by Ron Cowen The image is likely to correspond to a compact mini-galaxy"mini-galaxy" - J Kluger & NASA of blue stars that existed as we see it 13.42 billion years ago, around "380 million years" after the Big Bang (estimated at 13.8 billion years ago).Wall, Mike 2012. Ancient galaxy may be most distant ever seen. Space.com. 

At the time of the announcement, it was the oldest galaxy found. It beat the previous distance record holder by about 150 million light years. With the revision of the distance, it again became the oldest galaxy found as of December 12, 2012. The next attempt to see further will be the James Webb Space Telescope launched sometime this decade.

Unlike UDFy-38135539, UDFj-39546284 has not been spectroscopically confirmed. A galaxy first formed near to the end of the Dark Ages,mit.edu/tracker  2012-08-10 it offers information from early after the Big Bang.

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Category:Galaxies