Quasi-regular staying of solar system in supernova remnants and natural earth history

摘要

the Solar system, oscillating relative the Galaxy midplane during its revolution around the Galactic center, can occasionally fall inside the gas-dust interstellar clouds, which include remnants of Supernova explosions. These are mainly accumulated in t vicinity of the Galactic midplane. Being the Main sources of the cosmic rays, such remnants are characterized by a high density of relativistic particles. We show that the probability that the Earth meets a Supernova remnant in dangerous proximity during One of the Sun's passings through the Galaxy disk is about unity.