Hubble image of a lensing galaxy cluster, showing a vast number of galaxies mostly concentrated in the center of the image on a north-south axis. Streaks in the image are lensed galaxies much further away than the cluster. An inset image of a blurry red object indicates the location of the faintest galaxy.

Small, faint galaxy Tayna

This is a Hubble Space Telescope view of a very massive cluster of galaxies, MACS J0416.1-2403, located roughly 4 billion light-years away and weighing as much as a million billion suns. The inset is an image of an extremely faint and distant galaxy that existed only 400 million years after the big bang. Hubble captured it because the gravitational lens makes the galaxy appear 20 times brighter than normal.

Credits: NASA, ESA, and L. Infante (Pontificia Universidad Catolica de Chile)