NASA's Gamma Ray Fermi Space Telescope provided data used to measure all stars of light that our universe produced more than 90% of its history, the space agency has revealed. The scientists working on the project examined the gamma ray output of distant galaxies, using to estimate the star formation rates. This is the first time that researchers have measured all the stars produced on the history of the observable universe.
The research comes from the Clemson University College of Sciences, where the astrophysicist Marco Ajello and the postdoctoral researcher Vaidehi Paliya worked with their colleagues to analyze the data of the Fermi telescope. The work went through the history of stellar formation covering 90% of the history of the universe, finding that 4 × 10 ^ 84 visible light particles were emitted by stars, producing starlight.
Speaking about the search, Ajello said:
Based on the data collected by the Fermi telescope, we could measure the entire amount of light from the stars it had ever emitted. This has never been done before. Most of this light is emitted by stars that live in galaxies. Thus, this has allowed us to better understand the process of stellar evolution and to capture information about how the universe produced its luminous content.
Despite the huge number of photons, the Earth still gets most of its sunlight due to the large size of the universe. The light of the stars that reach Earth beyond our galaxy is as dim as a 60-watt light that is more than two kilometers away, leaving us with a dark night sky and visible small and bright stars to the distance.
NASA explains in the video about how Fermi works and why her data has been able to help researchers analyze the light of the stars of the universe. In addition to its target search, the study also confirms the estimates of the last stellar formation, according to the space agency, which were based on deep galaxy prospecting missions.
Findings will help improve future research on stellar evolution.