It would have to be. No society can survive without deterrent defense. The biggest fish will be the only one to rule the pond. If the race was advanced enough to have society it would be advanced enough to fight amongst itself. To get to space it would require a government and that government would require a military to have gotten to the point of being able to go to space.
idk how that would work unless it was completely reliant on some weird shield tech that was only effective at repelling super high energy thing? idk in that case maybe but the immediate response would probably be to nuke it.
Probably the structure is in such a way that it is effective against bombs and missiles, but not against bullets. Even a small hole could disbalance the pressure and would be hard to find
I suppose it could be something like reactive armor in that its super good against explosions but a super penetrating shot rather than a high explosive round would murder it just on a different scale?
Guess we just have to hope the aliens come at us expecting explosives only to find AP loaded AK-47s
alright, if a 9mm from here: https://en.wikipedia.org/wiki/9%C3%9719mm_Parabellum
has a weight of 0.0075 kg and a muzzle velocity of 380 m/s, then using the equation E(k in) = E(k out) (assuming no non-conservative forces), and the average person in a space suit is 224.528 kilograms( https://spaceflight.nasa.gov/outreach/SignificantIncidentsEVA/assets/space_suit_evolution.pdf)
then 1/2mv^2(bullet)=1/2mv^2(person).
doing the math, the person would have added 541.5 joules of kinetic energy and a velocity of 2.19 m/s.
That is of course assuming you have full force transfer from the bullet to the person, which probably wouldn't happen if you had an automatically reloading gun, or if the person wasn't holding the gun perpendicular to the center of mass.
They would be holding it in line with their shoulder so they would be put into puke worthy spin they couldn't stop lol
Also I was assuming it was a 7.62 cause an AK is pictured.
Also the person being so large in comparison to the bullet would dampen the effects of the hit lowering the velocity change by a lot.
also i used also too many times in this post also
In a straight fight, at least.
Guess we just have to hope the aliens come at us expecting explosives only to find AP loaded AK-47s
has a weight of 0.0075 kg and a muzzle velocity of 380 m/s, then using the equation E(k in) = E(k out) (assuming no non-conservative forces), and the average person in a space suit is 224.528 kilograms( https://spaceflight.nasa.gov/outreach/SignificantIncidentsEVA/assets/space_suit_evolution.pdf)
then 1/2mv^2(bullet)=1/2mv^2(person).
doing the math, the person would have added 541.5 joules of kinetic energy and a velocity of 2.19 m/s.
That is of course assuming you have full force transfer from the bullet to the person, which probably wouldn't happen if you had an automatically reloading gun, or if the person wasn't holding the gun perpendicular to the center of mass.
Also I was assuming it was a 7.62 cause an AK is pictured.
Also the person being so large in comparison to the bullet would dampen the effects of the hit lowering the velocity change by a lot.
also i used also too many times in this post also