Unlike a shooting star (🌠) that flashes and disappears, a comet is a rare celestial body observed over a long period. Thus, it has historically been used as a symbol for mysterious omens or major events.

After appearing as a key element in the Japanese anime "Your Name.", it's also widely used as an emoji symbolizing a fateful encounter or a poignant connection. It has come to hold an emotional narrative beyond just a simple cosmic phenomenon.