NASA's massive space telescope doubles as a pair of 'night goggles' for star seekers.
to the open access platform arXiv that describes two such candidate galaxies. He estimates one of these to be about 13.5 billion years old, making it the most distant galaxy ever detected. That would mean the system, GLASS-z13, was around perhaps as early as 300 million years after the Big Bang, which is thought to have occurred 13.8 billion years ago. As such, GLASS-z13 offers astronomers a never-seen-before view into the early days of the universe.
That confirmation, Smit says, will come from subsequent JWST observations that look more closely at the spectrum of light coming from GLASS-z13.GLASS-z13: Naidu et al. 2022, Castellano et al. 2022; Raw data: T. Treu and GLASS-JWST. NASA/CSA/ESA/STScI; Color images: P. Oesch & G. Brammer “How do you get all the stars in there so quickly? We think it takes time to build up a galaxy that’s massive enough, that has enough stars for it to be so bright.”But the redness of GLASS-z13 wasn’t Naidu’s only clue indicating the galaxy candidate was extremely far away. He also noticed something missing: the bluest photons.
Characteristics of GLASS-z13 are already raising new questions for astrophysicists who study the early days of the cosmos. Primarily, its remarkable brightness and mass has caught the attention of scientists. They estimate that it is approximately 1 billion times the mass of our sun.
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