Hubble Space Telescope tells a starry 'tail' of 12 mingling galaxies 

 The observations offer a window into the past to better understand how globular clusters may have formed. 

https://cdn.mos.cms.futurecdn.net/Vn5yFLGNMibSrzqYjxDWPd.jpg

https://www.space.com/hubble-space-telescope-star-formation-tidal-tail-galaxy-cluster