NASA posted this image, taken by NASA/ESA Hubble Space Telescope's Wide Field Camera 3, on social media recently. It shows a patch of space filled with galaxies of various sizes and shapes in the galaxy cluster SDSS J0952+3434.
Just below center is a formation of galaxies akin to a smiling face. Two yellow-hued blobs hang atop a sweeping arc of light. The lower, arc-shaped galaxy has the characteristic shape of a galaxy that has been gravitationally lensed — its light has passed near a massive object en route to us, causing it to become distorted and stretched out of shape.