Gayatri Mantra of planets

Sun:

Om Bhaskaraya Vidmahe
Mahadyutikaraya Dhimahi
Tanno Aditya Prachodayat

Moon:

Om Ksheeraputraya Vidmahe
Amruta-tatvaya Dhimahi
Tanno Chandra Prachodayat

Mars:

Om Angarakaya Vidmahe
Sakti Hastaya Dhimahi
Tanno Bhaumah Prachodayat

Saturn:

Om Neelanjanaya Vidmahe
Chhayamartandaya Dhimahi
Tanno Shani Prachodayat