William Herschel detected a strange object, which was a turning point, while Edmund Halley died before seeing the comet he predicted to return.
In late 2013, the European Space Agency launched the Gaia space observatory mission that observed more than one billion celestial objects.
Our current understanding of the evolutionary stages of massive stars, including black holes, is the result of an extensive theoretical work of an Indian–American scientist, Subrahmanyan Chandrasekhar, better known as Chandra.
Over the past decades, scientists have discovered particles and waves that come from space, which have helped better understand the universe.