Gravitational Lensing in the Galaxy Cluster Abell 2218
Click on image for full size
NASA / A. Fruchter / STScI
Gravitational Lenses - Nature's Telescope
The possibility that light could be bent by gravity was predicted by Albert Einstein
. This was seen soon after he predicted it
. People normally think of glass or plastic lenses as
bending light. So we call any object that bends light rays using gravity a
In the cluster Abell 2218 (pictured here), distant blue galaxies behind the large
cluster of galaxies are "squished" into a circular shape around the
middle of the foreground cluster. This is from gravitational lensing.
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