Brihaspati gayatri mantra

ॐ वृषभध्वजाय विद्महे करुनीहस्ताय धीमहि तन्नो गुरु: प्रचोदयात
ॐ अन्गिर्साय विद्महे दिव्यदेहाय धीमहि तन्नो जीव: प्रचोदयात्

The astika school of thought on the other hand is more related to the metaphysics of today's time. It describes that not everything that can't be seen in thought is unreal and those that exist in the otherworld can be sensed by a human. But to achieve that level of knowledge, one requires a high level of penance.
Om Gurudevaay Vidmahe Parbrahmaay Dheemahi Tanno Guru Prachodayat.
Om VrishabhDhwajay Vidmahe Karunihastaay Dheemahi Tanno Guru Prachodayat.

According to the siddhi dharma, Dev-Guru Brihaspati is the lord of all knowledge and wisdom. Because of this, he is the author of many Hindu scriptures such as Nitishastra, Dharmashastra, Vastushastra, and Brihaspati Smriti. As per the siddhi dharma, guru Brihaspati is responsible for the creation of the two knowledge systems, which are the nastika school of thought and the astika school of thought. The nastika school of thought in modern science and the belief here is that the only thing that exists is all that has matter. There is nothing beyond as they do not believe in the soul. There are twelve forms of himself that he created to spread the nastika school of thought - Loukya Brihaspati, Angiras Brihaspati, Dev Guru Brihaspati, Arthagya Brihaspati, Kamagya Brihaspati, Avedik Brihaspati, Satark Brihaspati, Prapanchashil Brihaspati, Duruha Brihaspati, Rajadrohi Brihaspati, Adrista Brihaspati, and Amokshi Brihaspati.

Meaning

I pray to the teacher of all gods and meditate upon the highly respected one among the deities, let the teacher enlighten my intellect, and guide me towards self-fulfillment.

Benefits

With the regular chanting of brihaspati mantras, one can expect to get the blessings of dev-guru brihaspati at all times, and have a prosperous life.Those who are wishing to have blessings for their family and are performing the rituals of appealing Jupiter, they will have a very happy and satisfied family with very less dispute or conflicts, because rishi brihaspati himself is family oriented.Guru brihaspati is believed to be the most benevolent and merciful planet of all. Worshiping and chanting his mantras results in very good fortune and it is believed that all the bad luck gets canceled out by chanting these mantras.If one is facing any problems and hardships in their life, and turns out it is all due to some I'll effect of some other planets, it is advised to them to chant the brihaspati mantras as it helps to reduce the adverse effects of the other planets.One can live a life which is free of fear or doubt if they follow regular chanting of brihaspati mantra.Rishi brihaspati is the guru of all the gods and has vast knowledge of the universe. So accordingly, the devotees who chant brihaspati mantras also gain all kinds of knowledge and wisdom which help them in their pursuits.