HD1 is a purported high red-shift galaxy, and as of April 2022, it is considered to be the earliest, youngest and most distant known galaxy yet identified in the observable universe, located only about (330 million years) after the Big Bang (13.8 billion years ago), a light-travel distance of 13.5 billion light-years from Earth, and, due to the expansion of the universe, a present proper distance of 33.4 billion light-years.
[NOTE: Co-moving distance and proper distance are two closely related distance measures used by cosmologists to define distances between objects. Proper distance roughly corresponds to where a distant object would be at a specific moment of cosmological time, which can change over time due to the expansion of the universe. Co-moving distance factors out the expansion of the universe, giving a distance that does not change in time due to the expansion of space (though this may change due to other, local factors, such as the motion of a galaxy within a cluster]
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