Cygnus X-1 Copyright David A. Hardy One of the first suspected examples of a black hole was Cygnus X-1. In 1972 a massive blue supergiant star in Cygnus was found to have an invisible companion which emitted X-rays. This was calculated to be 14 times as massive as the Sun – too massive to be … Read more
Astronauts work on Hubble in Endeavour’s payload bay; Story Musgrave, anchored on the end of the Canadarm, prepares to be elevated to the top of the HST to install protective covers on the magnetometers. Today on Far Future Horizons we present the BBC Horizon documentary “Hubble Vision”. Astronauts included in the STS-61 crew portrait include … Read more