Others suggest a meteor or a shooting star. However, the Christmas Star hung around for quite some time. Meteors and shooting stars last only moments in the atmosphere. These two are too just too brief to be the Star.
Others suggest a supernova in which a dying star implodes in upon itself. Supernovae are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy before fading from view over several weeks or months. The appearance of a supernova would easily be interpreted by the Wise Men as the birth of a great king according to their Babylonian religious beliefs. However, supernovas are stationary in their place in the sky. They don’t move around like the Christmas Star.