An international team of astronomers has found that extraordinary large loops of matter around the galaxy NGC 5907 are the relic of a gigantic collision between galaxies of similar sizes, which would have occurred 8 to 9 billion years ago. NGC 5907 galaxy (left) and result of the simulations (Jay Gabany, cosmotography.com / Observatoire de Paris / CNRS / Pythéas / NAOC) NGC 5907 is a spiral galaxy lying in the constellation Dragon, showing gigantic...
