This collection lists the most remote astronomical objects discovered and confirmed to date, as well as the time periods during which they were classified in this way.
For comparisons with the years after the Big Bang of the astronomical objects listed below, the age of the universe is currently estimated as 13.787 ± 0.020 billion years. However, the estimated age of the universe has increased over the years as the observational techniques have been refined. For the discovery of IOK-1 in 2006 had an estimate of 13.66 billion years for the age of the universe.