"The most distant known galaxy in the universe"

Since the universe is roughly 13.7 billion years old, UDFj-39546284 was around nearly at the beginning — just 480 million years after the Big Bang, or when the universe was just 4 percent of its current age.
Officially, UDFj-39546284 remains a "galaxy candidate," requiring some more observations to confirm its existence and age with certainty. But after performing a number of tests, Bouwens and his team are confident that the galaxy is there, and that its redshift is around 10.3.
"Everything we found was completely consistent with it being a real source," Bouwens said. "It looks really good right now."

Space: Astronomers Discover Oldest Galaxy Yet Seen, January 26, 2011