Essence Of Mantra

Aum = Brahma ;
bhoor = embodiment of vital spiritual energy(pran) ;
bhuwah = destroyer of sufferings ;
swaha = embodiment of happiness ;
tat = that ;
savitur = bright like sun ;
varenyam = best choicest ;
bhargo = destroyer of sins ;
devasya = divine ;
these first nine words describe the glory of God
dheemahi = may imbibe ; pertains to meditation
dhiyo = intellect ;
yo = who ;
naha = our ;
prachodayat = may inspire!
"dhiyo yo na prachodayat" is a prayer to God

Meaning : O God , the source of all beings. The Di speller of all darkness,the Bestower of Peace,Worthy of Devotion. The Blissful, the all Pervading , kindly enable us to meditate upon Thee! We pray to thee to enlighten out intellect.

Background : The Gayatri Mantra is first recorded in the Rig Veda (iii, 62, 10) which was written in Sanskrit about 2500 to 3500 years ago, and by some reports, the mantra may have been chanted for many generations before that. Gayatri Mantra is a highly revered mantra in Hinduism, second only to the mantra Om. Since all the other three Vedas contain much material rearranged from the Rig Veda, the Gayatri mantra is found in all the four Vedas. The deva invoked in this mantra is Savitr, and hence the mantra is also called Savitri.

Full scientific interpretation of the Mantra:
The earth (bhur), the planets (bhuvah), and the galaxies (swah) are moving at a very great velocity, the sound produced is Om, (the name of formless God.) That God (tat), who manifests Himself in the form of light of suns (savitur) is worthy of bowing / respect (varenyam). We all, therefore, should meditate (dheemahi) upon the light (bhargo) of that deity (devasya) and also do chanting of Om. May He (yo) guide in right direction (prachodayat) our (nah) intellect dhiyo