Abell 2218 is a large cluster of galaxies over 2 billion light-years away in the constellation Draco.

Acting as a powerful lens, it magnifies and distorts all galaxies lying behind the cluster core into long arcs.

The lensed galaxies are particularly numerous, as we are looking in between two mass clumps, in a saddle region where the magnification is quite large.

There is a pair of images in the lower part of the picture of the newly discovered star-forming galaxy at about redshift 7.

[4] Clusters of galaxies such as Abell 2218 have also been used to infer both the amount[5][6] and distribution[7][8][9] of Dark matter.