Mangala is a modern word for Mars and Tuesday. He is said to be the offspring of Sarva, a celestial archer, and Vikeshi, a manifestation of the Earth Goddess. Once Vikeshi was in trouble and Sarva came to her rescue. Vikeshi fell in love with Sarva and Mangal was born out of their union. In Roman mythology Mars is the God of war. In Indian mythology Mangal is identified as the planet of Kartikeya, the demi-God of war. http://www.suite101.com/article.cfm/mythology_from_india/86639 In other versions he is the son of Shiva and Earth and is called Born of Earth. http://www.medieval.org/music/world/carnatic/lyrics/navagraha.html In other versions he is born of Shiva without intervention of a woman. http://www.webonautics.com/mythology/mangal_mars.html He reaches maturity at 28.