The twisted disk of NGC 4753./Courtesy of NASA, ESA, Hubble Space Telescope

This is a photo capturing the twisted disk of galaxy NGC 4753. The disk of a galaxy refers to the disk-shaped structure surrounding the galaxy bulge. Scientists have identified the galaxy's history through filaments created by dark dust around the disk. The main hypothesis is that a relatively normal disk galaxy tore apart a dust-rich satellite galaxy by gravity, causing the disk to twist as the galaxy rotated as a result. This cosmic collision is estimated to have begun about 1 billion years ago.