While it may seem strange, the connection lies in the ancient belief that celestial events, particularly the alignment of stars, could have a significant impact on human affairs. A "disaster" was initially thought to be a "bad star" or an unfavorable celestial event that brought misfortune.
Over time, the meaning evolved, and "disaster" came to encompass any unfortunate event, regardless of its astronomical connection. However, the root word "aster" still holds a trace of its original meaning, suggesting an event that brings misfortune like a falling star.