Supernova 1987A marks a pivotal moment in astronomy, being the first supernova detected since the invention of the telescope that was observable with the naked eye. Discovered on February 23, 1987, in the Large Magellanic Cloud, it provided astronomers with a unique opportunity to study the stellar phenomena in real time. The explosion was the result of a massive star exhausting its nuclear fuel, causing a core collapse. This core collapse led to the ejection of the outer layers of the star into space at high velocities.

The observation of Supernova 1987A came from Ian Shelton and Mike W. Guidry, who were monitoring the sky for such events. They utilized the Las Campanas Observatory in Chile, which allowed for clear observation conditions. As the supernova brightened, it became a focal point for astronomers worldwide, allowing for extensive studies in diverse wavelengths, from radio to gamma rays. Important findings included the detection of neutrinos, which were recorded by detectors in Japan and the United States, solidifying the connection between explosive stellar death and neutrino emissions.

In the ensuing years, Supernova 1987A continued to be a subject of study, revealing insights into the chemical evolution of the universe. Observations of its remnant have provided critical data concerning the interaction of the ejected materials with the surrounding medium, enhancing our understanding of the lifecycle of stars and the genesis of heavy elements. These findings underline the significance of Supernova 1987A as a key astronomical event of the late 20th century, influencing both theoretical and observational cosmology.