Figure 23-33: R I V U X G
Gravitational Lensing by a Cluster of Galaxies The blue arcs in this image of the rich cluster CL 0024+1654 are distorted multiple images of a single more distant galaxy. These images are the result of gravitational lensing by the matter in CL 0024+1654. The cluster is about 1600 Mpc (5 billion ly) from Earth; the blue galaxy is about twice as distant. The blue color of the remote galaxy suggests that it is very young and is actively forming stars.
Gravitational Lensing by a Cluster of Galaxies The blue arcs in this image of the rich cluster CL 0024+1654 are distorted multiple images of a single more distant galaxy. These images are the result of gravitational lensing by the matter in CL 0024+1654. The cluster is about 1600 Mpc (5 billion ly) from Earth; the blue galaxy is about twice as distant. The blue color of the remote galaxy suggests that it is very young and is actively forming stars.
(Science Source)