The Chandra X-ray Observatory has revealed a ring of black holes or neutron stars, or even both, 300 million light years away from Earth

The Chandra X-ray Observatory has revealed a ring of black holes or neutron stars, or even both, 300 million light years away from Earth
You have now! Find out here what the Arp 142 galactic collision has in common with issue one of our newly launched sister magazine, World of Animals.