Space and the celestial atmosphere never cease to astonish and intrigue us. All kinds of strange scenarios if imagined in the space environment give super interesting results. Let’s imagine that you fired a gun in the space… then… you will think that it can’t be…. because fires can’t burn in the oxygen-free vacuum but add to this the fact that modern day guns come with their own oxidizer. So now you have shot a bullet in the space and then what happens? There can be different interesting scenarios in this.
Would the bullet reach somewhere traceable?
Assuming that one fine day you decide to put the whole cosmos at your gun point and actually pull the trigger. What would happen? Well first of all Newton’s third law of motion will kick into action which means that the force exerted on the bullet will impart equal and opposite force towards you. So in absence of friction, you will start moving backwards. But there is a point… since the bullet is far lighter than you and assuming it leaves the gun barrel at 1,000 metre per seconds you will head in the other direction at a speed of few centimetres per second because you are much more massive than the bullet.
If you are worried about the destiny of the poor bullet then you should know that the bullet will keep going forever and ever. Matija Cuk, an astronomer with joint appointments at Harvard University and the SETI Institute says: “The bullet will never stop, because the universe is expanding faster than the bullet can catch up with any serious amount of mass to slow it down.” Even if you assume that the bullet encountered a few atoms per cubic centimetre, the bullet will come to a standstill after 10 million light years!!