Greek mythology in popular culture elements tantalum and niobium are always found together in nature, and have been named after the King Tantalus and his daughter Niobe. The element promethium also draws its name from Greek mythology, as does titanium, which was named after the titans who in mythology were locked away far underground, which reflected the difficulty of extracting titanium from ore. The U.S. Apollo Space Program to take astronauts to the moon, was named after Apollo, based the god's ability as an archer to hit his target and being the god of light and knowledge. Oceanographer Jacques-Yves Cousteau named his research ship, a
Iris (mythology) Iris (mythology) In Greek mythology, Iris (; ) is the personification and goddess of the rainbow and messenger of the gods. According to Hesiod's "Theogony", Iris is the daughter of Thaumas and the Oceanid Electra, and the sister of the Harpies: Aello and Ocypete. During the Titanomachy, Iris was the messenger of the Olympian Gods, while her twin sister Arke betrayed the Olympians and became the messenger of the Titans. She is the goddess of the rainbow. She also serves nectar to the gods and goddesses to drink. Iris is married to Zephyrus, who is the god of the west