Know as a Greek god
In Greek mythology, Apollo was one of the most important Olympian gods. The son of the god Zeus and Leto, Apollo was associated with prophecy, medicine, music and poetry, archery, and the care of flocks and herds. He was also frequently associated with the higher developments of civilization, such as law, philosophy, and the arts. Finally, in Greek mythology, Apollo driving his chariot through the sky was associated with the movement of the Sun. He was twin brother to Artemis, goddess of hunting, though Athena was also a sister of his as well.
The image of Apollo was preserved for thousands of years in artistic works. One of these artistic works, the design for the mission insignia of Apollo 17, included a profile of Apollo facing to his left. Additionally, the mission insignia for Apollo 13 depicted the steeds of Apollo riding over Luna.
n 2267, the USS Enterprise encountered Apollo on Pollux IV. There, they learned that the Greek gods were in fact a band of explorers who had visited Earth five thousand years earlier, and established themselves as gods to the people of that era. From things Apollo said to Carolyn Palamas, it seems that they may actually have, in some sense, considered themselves to be gods, but it is clear they also knew they weren't gods in the same sense the ancient Greeks believed them to be.
Apollo claimed he and his fellow travelers visited Earth, and there thrived on the worship and love of its people. But eventually, mankind turned away from the gods. Unable to survive as memories, the gods returned to Pollux IV, their home. They found it an empty place without worshipers, but they lacked the strength to leave. So they waited. Eventually, all of the gods save Apollo lost hope, and "spread themselves upon the wings of the wind... thinner, and thinner, until only the wind remained." Apollo claimed this was not death, at least, not as Humans understood it. But clearly, those who had departed in this fashion were beyond returning. Only Apollo was confident that mankind would one day leave Earth, and find the gods again. And when it happened, he planned to "restore the proper order" – to restore man to a worshipful species, provided for and loved by a new race of gods, fathered by him. (He needed a wife to accomplish this task, and so chose Carolyn to be his queen based on her beauty and intelligence.) This, unfortunately for Apollo, was a state of affairs unacceptable to men. James T. Kirk and his landing party schemed continuously; between them, and members of the crew still in orbit, they were eventually able to overcome Apollo, and destroy the source of his power. With his temple gone and his power broken, Apollo spread himself upon the wind, imploring his fellow gods to take him, and vanished.