An article published in the journal “Astronomy & Astrophysics” reports the most detailed view ever obtained of remains inside the galaxy cluster Abell 3667 with a shock wave that expands over about 6.5 million light-years, the largest ever identified. A team of researchers led by Francesco de Gasperin of the Italian National Institute of Astrophysics used the MeerKAT radio telescope to obtain detailed images of a shock wave generated by the collision between two galaxy clusters that occurred over a billion years ago.