What Made the Universe Magnetic?

LV13567 - The Universe is magnetic. Astrophysical observations strongly suggest the all galaxies, clusters of galaxies, and even empty space between galaxy clusters are pervaded by magnetic fields. In this paper, we solve the longstanding problem of the origin of such magnetic fields, by showing how they naturally emerge from ''inflation'', an incredibly fast expansion of the universe happened soon after the Big Bang. Theorized by the American physicist Alan Guth in the 80's and experimentally confirmed by the NASA satellite ''Wilkinson Microwave Anisotropy Probe'' in 2006, inflation, beside to explain some major technical problems in cosmology, generates the seeds for the growth of galaxies and, ultimately stars, planets, and ourselves. In our paper, we show that inflation is also able to excite tiny dormant magnetic fluctuations ever-present in the vacuum, which are then amplified and stretched up to overfill the entire Universe. Inflation then, can number among its achievements also a simple explanation of why the Universe is magnetic