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Cosmos Redshift 7
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Cosmos Redshift 7 : ウィキペディア英語版
Cosmos Redshift 7

Cosmos Redshift 7 (also known as COSMOS Redshift 7, Galaxy Cosmos Redshift 7, Galaxy CR7 or CR7) is a high-redshift Lyman-alpha emitter galaxy (meaning CR7 is one of the oldest, most distant galaxies), in the constellation Sextans, about 12.9 billion light travel distance years from Earth, reported to contain the first stars (first generation; Population III)—formed soon after the Big Bang during the reionisation epoch (redshift, z ∼ 6−7),〔 when the Universe was about 800 million years old—to have provided the chemical elements (like oxygen, nitrogen, carbon, calcium and iron) needed for the later formation of planets and life as it is known.
==Description==
Galaxy Cosmos Redshift 7 contains old Population II (metal-poor) and Population III (extremely metal-poor) stars, according to astronomers,〔〔 and is three times brighter than the brightest distant galaxies (redshift, z > 6)〔 detected up to the time of its discovery.〔〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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