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Stars forming just 250 million years after Big Bang

 
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PostPosted: 16.05.2018 20:33    Post subject: Stars forming just 250 million years after Big Bang Reply with quote

Astronomers find evidence for stars forming just 250 million years after Big Bang

https://m.phys.org/news/2018-05-alma-most-distant-oxygen-universe.html

"The team then reconstructed the star formation history in the galaxy using infrared data taken with the NASA/ESA Hubble Space Telescope and NASA's Spitzer Space Telescope. The observed brightness of the galaxy is well explained by a model where the onset of star formation was another 250 million years ago. The model indicates that the star formation became inactive after the first stars ignited. It was then revived at the epoch of the ALMA observations: 500 million years after the Big Bang.

The astronomers suggest that the first burst of star formation blew the gas away from the galaxy, which would suppress the star formation for a time. The gas then fell back into the galaxy leading to the second burst of star formation. The massive newborn stars in the second burst ionized the oxygen between the stars; it is those emissions that have been detected with ALMA."

Galaksit syntyvät sisältä ulos päin 😀

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