2016 World Day Against Child Labor: Child Labor and Supply Chains
Friday, March 11, 2016
Frontier Fields Galaxy Cluster MACS J0717
Frontier Fields Galaxy Cluster MACS J0717: 'Frontier Fields' galaxy cluster MACS J0717, one of the most complex and distorted galaxy clusters known, is the site of a collision between four clusters. It is located about 5.4 billion light years away from Earth.