A short animation of comet ATLAS breaking up, as observed by the Hubble Space Telescope. I cleaned up all the cosmic rays and artifacts for your viewing delight. It repeats several times since only 5 frames without a loop option would be very short indeed. In the upper right corner is a background star which is streaked because the comet moves against the background sky rather quickly.
Five observations spanning 36 minutes were used to make this animation. The proposal can be found here:
Breakup of Long-Period Comet C/2019 Y4 (ATLAS)
All channels: WFC3/UVIS F350LP
North is up.