A closer look at galaxy M64's outer disk shows that it came from a smaller dwarf galaxy

An international team of astronomers, astrophysicists and cosmologists, has found evidence of galaxy M64's outer disk originating from a smaller, nearby, dwarf galaxy. The team has written a paper describing their findings that has been accepted for publication in The Astrophysical Journal Letters—in the meantime, it can be read on the arXiv preprint server.