The Brahmastra, described in the Mahabharat, is the weapon which is said to be a single projectile charged with all the power of the Cosmos.
It’s considered to be equivalent to the modern day Atomic Bomb.
Brahma is considered the Creator in Sanatan Dharma, and its believed that Brahmastra was created by him for the purpose of upholding Dharma & Satya, to be used by anyone who wished to destroy an enemy who would also happen to be a part of his (Brahma’s) creation.
The target, when hit by Brahmastra, would be utterly destroyed. In Mahabharata era Parasurama,Bhishma,Drona ,Karna ,Kripa ,Ashwatthama,Arjuna,
Yudhishtir, Vikarna and few Maharathis possessed the knowledge to invoke Brahmastra weapon.
When a Brahmastra is discharged, neither a counterattack nor a defense of any kind can stop it. In ancient Sanskrit writings, the Brahmastra was a weapon created by Brahma,along with its more powerful versions like Brahmashirsha astra and Brahmanda astra.
Robert Oppenheimer (1904-1967) was a scientist, philosopher, bohemian, radical, fanatic of ancient Sanskrit literature,a theoretical physicist and the supervising scientist of the Manhattan Project, and most importantly, the developer of the atomic bomb.
Seven years after the first successful atom bomb blast test in New Mexico (Trinity), Dr. Oppenheimer was giving a lecture at Rochester University.
To the question “Was the bomb exploded at Alamogordo during the Manhattan project the first one to be detonated?” he gave a strange reply “Well — yes. In modern times, of course.”And as for Oppenheimer’s first words after the detonation of the bomb he quoted from Hindu epic Mahabharata , “If the radiance of a thousand suns were to burst at once into the sky, that would be like the splendor of the mighty one. Now, I am become Death, the destroyer of worlds.” (Bhagavad Gita)
It is thought that the Brahmashirsha astra is the evolution of the Brahmastra, 4 times stronger than Brahmastra. It is similar to modern day hydrogen bomb or thermonuclear (fusion) bomb.
In the epic Mahabharata, it is said that the weapon manifest with the four heads of Brahma as its tip. In Mahabharata era Parasurama,Bhishma, Drona,Karna, Ashwatthama,Arjuna possessed the knowledge to invoke this weapon.
This astra can be invoked by using sacred mantras into any object, even to a blade of grass .
Brahmastra was created for the purpose of upholding Dharma and Satya.