An article published in the journal “Astronomy & Astrophysics” describes the observation of a small group of galaxies attracted by the galaxy cluster Abell 2142 and approaching it a trail of very hot gas was created. A team of researchers led by Dominique Eckert, now at the German Max Planck Institute for Extraterrestrial Physics, used NASA’s Chandra X-ray space observatory to detect the emissions from a sort of tail that extends over a million light years.