Caption:
MACS J0717.5+3745 (or MACS J0717 for short), one of the most complex and distorted galaxy clusters known, is the site of a collision between four clusters. It is located about 5.4 billion light-years away from Earth.
Credit:
Album / Science Source / NASA, ESA, CXC, NRAO/AUI/NSF, STScI, and R. van Weeren (Harvard-Smithsonian Center for Astrophysics)