A SEARCH for X-ray emission from galactic objects on April 29, 1963, disclosed two localized sources, one of which appeared in Scorpius and the other in the direction of the Crab Nebula.

A new Hubble Space Telescope image offers the most detailed view of the Crab Nebula, which is located 6,500 light-years from Earth. The star V830 Orionis features NGC 1999 reflection nebula ...