Location: United States
Answer to the above is "one and the same".
David Talbott is an historian and researcher who works with engineers, astronomers, plasma physicists, and other scientists on a work titled The Thunderbolts Project. One of his former areas of research was, and probably still is, the relation of the planets Venus, Mars, and Saturn to World Mythology.
One of his surprising discoveries was that the planet Venus doubled as the Doomsday Comet in the lore of many ancient civilizations. The long "tail" that characterizes some comets was considered the long flowing hair of the goddess (Venus, if you'll now recall, is both the name of the planet we used to call "Morning Star" and the name of a Roman deity).
During the period when the planet, as "comet" was thought to be responsible for calamity, the appearance of this "hair" transformed into something far more monstrous in the eyes of the people, eventually giving rise to the myths of the Hydra, the Wyvern, the Dragon, the Hecatoncheires, Medusa, and many others.