Transient plasma structures in the region ahead of the shock front accelerate particles in the direction of the arrow | Illustration: Ben C. Smith, from the research paper by Raptis et al. Transient plasma structures in the region ahead of the shock front accelerate particles in the direction of the arrow | Illustration: Ben C. Smith, from the research paper by Raptis et al.图:ynet-pic1.yit.co.il