A near-Earth supernova is a catastrophic event in which a star close to our planet explodes, releasing a massive amount of energy and radiation in the form of a supernova. Some synonyms for this phenomenon could include a close-range supernova, local supernova, or even a nearby supernova. Another possible term could be an intra-galactic supernova, highlighting the fact that the explosion occurs within our own galaxy. Some might refer to this event as a low-velocity supernova, due to the relatively slow speeds that these explosions occur at. Regardless of the terminology used, a near-Earth supernova would be a momentous and dramatic event that would have significant implications for life on our planet.