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TheJames Webb Space Telescope(JWST ) has found a galaxy in the former universe that ’s so monolithic , it should n’t survive , put a " pregnant challenge " to the standard model of cosmology , according to the discipline author .
The coltsfoot , called ZF - UDS-7329 , contains more stars than theMilky Way , despite having formed only 800 million years into the existence ’s 13.8 billion - twelvemonth biography span . This intend they were somehow bear withoutdark matterseeding their formation , adverse to what the standard model of extragalactic nebula formation suggests .
JWST-7329: a rare massive galaxy that formed very early in the Universe.
How this could have happened is unclear , but much like previous JWST uncovering ofother inexplicably massive wandflower in the former universe , it threatens to upend our savvy of how the first matter in the universe of discourse imprint , or maybe even the received model of cosmology itself . The researchers publish their findings Feb. 14 in the journalNature .
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" Having these super massive galaxy so early in the universe is posing significant challenge to our standard model of cosmogeny , " cogitation Centennial State - authorClaudia Lagos , an associate prof of astronomy at the International Centre for Radio Astronomy Research , said in a statement . This is because monolithic dark topic bodily structure , which are thought to be necessary components for hold former galaxies together , did not yet have time to form this early in the universe , Lagos added .
Light travels at a fixed speed through the vacuum of space , so the deeper we look into the universe , the more remote spark we intercept and the further back in prison term we see . This is what enabled the researchers to use JWST to spot ZF - UDS-7329 roughly 11.5 billion years in the past .
By studying the spectrum of Inner Light coming from the stars of this extremely distant beetleweed , the research worker found that the star were brook 1.5 billion years prior to that observation , or roughly 13 billion yr ago .
Astronomers are n’t certain when the very first globules of stars began to constellate into the galaxies we see today , but cosmologists previously estimated that the cognitive operation begin tardily within the first few hundred million years after theBig Bang .
Current theories suggest that halos of moody subject ( a occult and unseeable substance believed to make up 25 % of the present world ) combined with gas to form the first seedlings of galaxies . After 1 billion to 2 billion years of the universe ’s life , the early protogalaxies then reached adolescence , forming into dwarf galaxies that begin raven one another to farm into ones like our own .
But the new discovery has confounded this scene : Not only did the galaxy crystallize without enough build up dark matter to sow it , but not long after a sudden burst of star formation , the wandflower short became quiescent — stand for its star geological formation ceased .
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" This push the bound of our current understanding of how galaxies form and develop , " field co - authorThemiya Nanayakkara , an astronomer at the Swinburne University of Technology in Australia , said in the statement . " The fundamental question now is how they form so tight very early in the universe , and what mysterious mechanics lead to stopping them forming stars abruptly when the rest of the universe is doing so . "
The researchers ' next steps will be to research for more galaxies like this . If they find out any , it could seriously negate anterior ideas of how galaxies formed , they pronounce .
