Image: X-ray: NASA/CXC/University of Amsterdam/N.Rea et al; Optical: DSS Two years ago, evidence of a big cosmic burst reached Earth in the form of bright blue flash. Nicknamed “the Cow,” it ...

Scientists say they finally have an explanation for a mystifying, bright blue light that came from deep in space. Three years ago, astronomers were stunned to see a bright blue flash that came out ...