The First part of every mantra is 'Om'. Om symbolizes 'Ganapati' the God of the Ganas, who fought against the demons and the rakshasa (the evil doers). When the yagana could not be continued and Rishis were not let to live in peace and to continue to perform the rituals they approached Lord Siva. Lord Siva was pleased with the penance of the Rishis and assured them that they would be relieved of their suffering. That was the advert of Sri Vinayaka as the lord of the Ganas assuming the position of Ganadhipathi. Sri Varasiddi Vinayaka is also called Parvathi Thanava, Ganesh, Lamodara, Gajanana etc., related to his birth.
There are various versions in the Puranas like Padma Purana, Linga Purana and Siva Purana about his divine birth and existence who is worshipped by Gods too, to overcome obstacles before their start anything. Even Pooja to other Gods and Goddesses begin with invocation to Sri Ganesha. Lord Vishnu proclaimed that worship revolved to any God is futile, if it is not invoked by the blessing of Sri Varasiddi Vinayaka.
Sri Varasiddi Vinayaka Swamy with Siddhi and Buddhi
One of the traditions says that Ganesha was a Bramhmachari which means unmarried. It is popular in South India. While in the North of the India, Ganesha is often portrayed as married to two daughters of Bramha i.e. Buddhi(Knowledge) and Siddhi (Spiritual power & Intellectual).
There are number of centres of worship in India where Sri Vinayaka Swamy is worshipped as Siddhi Buddhi Sametha Vinayaka. While the elephant head Deity by himself represents the Pure Pranava.
Navagraha or the Nine Planets has great importance in Hinduism and Hindu rituals. Navagrahas are considered to play a major role in deciding the destiny of man. The Navagrahas are Surya (Sun), Chandra (Moon), Mangal (Mars), Budha (Mercury), Brihaspati (Jupiter), Shukra (Venus), Shani (Saturn), Rahu (North Lunar Node) and Ketu (South Lunar Node). It is believed that these nine planetary deities influence human lives and is responsible for all good or bad times, one faces in life.