Massive Cluster of Spiral and Elliptical Galaxies Captured by Hubble Telescope

It hardly gets any bigger than this: A massive galaxy cluster is visible in this image captured by the NASA/ESA Hubble Space Telescope's Wide Field Camera 3.

Almost every object seen here is a galaxy, each containing billions of stars. Galaxies are not usually randomly distributed in space, but instead appear in concentrations of hundreds, held together by their mutual gravity. Elliptical galaxies, like the yellow fuzzy objects seen in the image, are most often found close to the centers of galaxy clusters, while spirals, such as the bluish patches, are usually found to be further out and more isolated. This vast galaxy cluster is designated as MACS J0152.5-2852 -- there are many of them.