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
Pontus (mythology) and his sister-consort Ceto, and the "Strong Goddess" Eurybia. With the sea goddess Thalassa (whose own name simply means "sea" but is derived from a Pre-Greek root), he fathered the Telchines and all sea life. In a Roman sculpture of the 2nd century AD, Pontus, rising from seaweed, grasps a rudder with his right hand and leans on the prow of a ship. He wears a mural crown, and accompanies Fortuna, whose draperies appear at the left, as twin patron deities of the Black Sea port of Tomis in Moesia. Pontus (mythology) In Greek mythology, Pontus (; , , "Sea")