that NGC 3923 is about 50% larger than the Milky Way, and its shells are the largest of all known shell galaxies.The shells aren’t the only feature of the 250-megapixel image.
Towards the top of the image is a large gravitational lens around the galaxy cluster PLCK G287.0+32.9. Gravitational lenses are massive objects or collections of objects in space with gravitational fields so strong that they bend light passing by them from more distant sources, allowing the light from those distant objects to be magnified.
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