Each glowing speck in this Hubble Space Telescope (@NASAHubble) image is a different galaxy…except for the bright flash in the middle, which is actually a star within our own galaxy that just happened to be in the way.
October 30 | 2017
The Universe contains structures on various scales — planets collect around stars, stars collect into galaxies, galaxies collect into groups, and galaxy groups collect into clusters. Galaxy clusters contain hundreds to thousands of galaxies bound together by gravity. Dark matter and dark energy play key roles in the formation and evolution of these clusters, so studying massive galaxy clusters can help scientists to unravel the mysteries of these elusive phenomena. This image was taken in infrared as part of an observing program that looked at 41 massive galaxy clusters with the aim of finding the brightest distant galaxies for the forthcoming James Webb Space Telescope to study. Such research will tell us more about our cosmic origins. Credit: ESA/Hubble & NASA