The Owl Nebula spans 3.4′ and lies some 2,800 light-years away. It is some 8,000 years old, and so will expand for years to come, as most planetaries grow for about 50,000 years before vanishing ...

In 2025, the National Heart and Lung Institute and the British Heart Foundation’s Centre of Research Excellence at Imperial College London are offering our Fifth Annual Science in Medicine School ...