For years, scientists have been on the hunt for a mysterious “Planet Nine” that may exist in our solar system with a massive orbit of thousands鈥攐r even millions鈥攐f years.
In 2011, a provocative hypothesis posed by a duo of planetary astronomers from the University of Louisiana-Lafayette named its version of this mysterious planet聽Tyche. They proposed a planet estimated to be four times the size of Jupiter was located somewhere at the outermost reaches of the solar system.
It鈥檚 hard to know what is more enjoyable: stories about planets themselves or the meaning behind their names. NASA can handle the astronomy; here’s the meaning behind the name.
Who was Tyche?
Tyche (pronounced tayh-kee) is derived from the Greek word for 鈥減rovidence, fortune鈥� and the Roman fortuna. It also refers to聽the ancient Greek goddess of spirit and fortune鈥攁 tutelary deity that聽oversees the destiny of a city. The Greek historian Polybius believed that when no direct cause could be identified for floods, drought or frosts, the blame fell on Tyche鈥檚 shoulders. A capricious dispenser of both good and ill will, Lady Luck giveth and taketh away.
(If you think this is a strange name, consider the聽one given to a mysterious green blob in outer space: Hanny’s Voorwerp. Learn the source of that moniker, here.)
The daughter of the Titans Oceanus and Tethys, Tyche is often depicted holding a large cornucopia that represents good luck and fortune and from which an abundance of coins fall. She also holds a rudder,聽helping her to guide and conduct the fates of the world. Finally, a ball聽completes her regalia,聽representing the unsteadiness of any given fortune.
Tyche鈥檚 benevolent sister and nemesis was, well, Nemesis: the goddess of retribution and indignation. An avenging goddess, Nemesis is regarded as the balancer of fortunes handed out by Tyche.
Is there a “Planet Nine”?
Most interestingly, astronomers chose the name Tyche because the discovery of this new celestial body counteracts a once-held hypothesis that a solar object named Nemesis is responsible for regular, repeated extinctions on Earth.
Unfortunately for Tyche, a 2014 search ruled out the possibility this particular planet exists. However, scientists are still searching for that mysterious “Planet Nine” (sorry Pluto, some of us still remember you!)鈥攁nd we’re sure its name will be exciting once it’s found.
Mythology is such a pervasive source of names in our culture that many of them probably escape your attention. For example, who is the one-armed god that Tuesday is named for? Or the comely Norse goddess that is Friday’s namesake? Find out here.
