UDFj-39546284
UDFj-39546284 is a candidate for a galaxy with a redshift z ~ 10. At the time of its discovery in January 2011, it is probably the most distant known object in the universe. The galaxy was discovered in the Hubble Ultra Deep Field in the infrared range.
properties
With a redshift of z = 10, the light took 13.2 billion years from UDFj-39546284 to the earth, so the universe was 480 million years young when the light was emitted. This makes UDFj-39546284 one of the first galaxies to be formed in the universe. Previous searches found many galaxies that formed around 650 million years after the Big Bang. If the discovery is confirmed, UDFj-39546284 will be the only known galaxy that is even older. At this point the number of galaxies and stars must have grown rapidly.
swell
- http://firstgalaxies.org/galaxies-at-redshift-ten , January 27, 2011 (Archive.org)
Web links
- Abstract of an article on UDFj-39546284 in Science News. Full text for subscribers only , accessed November 15, 2017.
- Hubble finds a new contender for galaxy distance record - Article on the homepage of the Hubble telescope , accessed on November 15, 2017.