What is the further object that is being lensed by Abell 2218?
The recently discovered “baby galaxy” has a redshift of 5.58, corresponding to a distance of about 13.4 billion light-years. The galaxy’s light has been magnified more than 30 times by Abell 2218 and split into two “images” by the uneven distribution of matter in the cluster. It has been determined that the amount of matter in the object is astoundingly low for a galaxy only a few million times the mass of our Sun, or about one hundred thousand times less than the amount of matter in our own Milky Way galaxy. The object is only around 500 light-years across, as compared to the 100,000 light-year diameter of the Milky Way.
