Ares, In Greek mythology, the God of War, son of Zeus and Hera
When the the world clock was established and Greenwich England became time zero, A point in the Celestial sphere above Greenwich England was chosen. What was chosen? The Star Aries in the Constellation Aries and it became known as the first point of Aries.
Why would NASA pick a WAR symbology rather than an astronomical sign? No classically trained Rocket engineers? Yup, in my opinion!!!