Astrophysicists who want to reveal the greatest mystery of our galaxy. A huge bubble in the center of the Milky Way of unknown origin focuses the attention of the Fermi telescope scientists, meeting in Spain for the first time.
In a brief instant, gamma-ray bursts release more energy than all the stars in the universe combined. Some signals come from so far away that it is dizzying: it is gamma light that was emitted 12.5 billion years ago, when the universe was almost a newborn.