The Hubble telescope images allowed UCL experts to calculate the age of the oldest stars in those galaxies and estimate the time of the cosmic dawn.
The research team says, James Webb TelescopeSet to be launched in November, it will be sensitive enough to detect and search for the dark ages of the universe, and then search for points of light.
The study, which was published in the Monthly Notices of the Royal Astronomical Society, also included a study of six of the most distant galaxies currently known, and the light reaching Earth from these six galaxies took most of the age of the universe to reach us, according to the researchers.
The researchers found that the distance of these galaxies corresponds to a “look back” time more than 13 billion years ago, when the universe was only 550 million years old, and then they were able to use images from the Hubble and Spitzer space telescopes, to estimate the age of the oldest stars in these six galaxies – This also allowed them to estimate their age at the time we were watching them, and they also found that they formed 200 to 300 million years ago – about 250 to 350 million years after the birth of Christ. the great explosion – But current telescopes cannot look that far.
Lead author Dr Nicholas Laporte of the University of Cambridge, who started the project while at the University of California, said: ‘Theorists believe that the universe was a dark place for the first few hundred million years, before the first stars and galaxies formed, and watching the moment the universe first immersed in Starlight is a major task in astronomy.”
It is hoped that the first stars will be bright enough to be seen with James Webb, which has been described as a “cosmic time machine” due to its ability to go deep into universe history More than any telescope before it.