An article published in “The Astrophysical Journal” reports a study on the star Kappa 1 Ceti, very similar to the Sun in size and mass but much younger having an estimated age between 600 and 750 million years. A team of researchers coordinated by NASA’s Goddard Space Flight Center predicted some hard-to-measure features of Kappa 1 Ceti using computer models based on data collected by various NASA and ESA space telescopes. The results help to understand what the Sun looked like nearly four billion years ago, when it could emit superflares, to reconstruct the influence of its activity on early Earth and early life.