V404 Cygni: Astronomers Detect Signs of Extraordinary Activity in Binary System

Astronomers using a fleet of orbiting telescopes, including ESA’s Integral satellite, NASA’s Swift satellite and the Japanese MAXI telescope, have observed a strong outburst of gamma rays and X-rays produced by a low-mass black hole in a binary system called V404 Cygni. V404 Cygni lies in the constellation Cygnus at a distance of about 8,000 [...] —> Read More